This schema is the first official release that includes an xsd and requires unit class, unit modifier, value class, schema attribute and property sections. Event Something that happens at a given time and (typically) place. Elements of this tag subtree designate the general category in which an event falls. suggestedTag Task-property Sensory-event Something perceivable by the participant. An event meant to be an experimental stimulus should include the tag Task-property/Task-event-role/Experimental-stimulus. suggestedTag Task-event-role Attribute/Sensory Agent-action Any action engaged in by an agent (see the Agent subtree for agent categories). A participant response to an experiment stimulus should include the tag Agent-property/Agent-task-role/Experiment-participant. suggestedTag Task-event-role Agent Data-feature An event marking the occurrence of a data feature such as an interictal spike or alpha burst that is often added post hoc to the data record. suggestedTag Data-property Experiment-control An event pertaining to the physical control of the experiment during its operation. Experiment-procedure An event indicating an experimental procedure, as in performing a saliva swab during the experiment or administering a survey. Experiment-structure An event specifying a change-point of the structure of experiment. This event is typically used to indicate a change in experimental conditions or tasks. Measurement-event A discrete measure returned by an instrument. suggestedTag Data-property Agent Someone or something that takes an active role or produces a specified effect.The role or effect may be implicit. Being alive or performing an activity such as a computation may qualify something to be an agent. An agent may also be something that simulates something else. suggestedTag Agent-property Animal-agent An agent that is an animal. Avatar-agent An agent associated with an icon or avatar representing another agent. Controller-agent An agent experiment control software or hardware. Human-agent A person who takes an active role or produces a specified effect. Robotic-agent An agent mechanical device capable of performing a variety of often complex tasks on command or by being programmed in advance. Software-agent An agent computer program. Action Do something. extensionAllowed Communicate Convey knowledge of or information about something. Communicate-gesturally Communicate nonverbally using visible bodily actions, either in place of speech or together and in parallel with spoken words. Gestures include movement of the hands, face, or other parts of the body. relatedTag Move-face Move-upper-extremity Clap-hands Strike the palms of against one another resoundingly, and usually repeatedly, especially to express approval. Clear-throat Cough slightly so as to speak more clearly, attract attention, or to express hesitancy before saying something awkward. relatedTag Move-face Move-head Frown Express disapproval, displeasure, or concentration, typically by turning down the corners of the mouth. relatedTag Move-face Grimace Make a twisted expression, typically expressing disgust, pain, or wry amusement. relatedTag Move-face Nod-head Tilt head in alternating up and down arcs along the sagittal plane. It is most commonly, but not universally, used to indicate agreement, acceptance, or acknowledgement. relatedTag Move-head Pump-fist Raise with fist clenched in triumph or affirmation. relatedTag Move-upper-extremity Raise-eyebrows Move eyebrows upward. relatedTag Move-face Move-eyes Shake-fist Clench hand into a fist and shake to demonstrate anger. relatedTag Move-upper-extremity Shake-head Turn head from side to side as a way of showing disagreement or refusal. relatedTag Move-head Shhh Place finger over lips and possibly uttering the syllable shhh to indicate the need to be quiet. relatedTag Move-upper-extremity Shrug Lift shoulders up towards head to indicate a lack of knowledge about a particular topic. relatedTag Move-upper-extremity Move-torso Smile Form facial features into a pleased, kind, or amused expression, typically with the corners of the mouth turned up and the front teeth exposed. relatedTag Move-face Spread-hands Spread hands apart to indicate ignorance. relatedTag Move-upper-extremity Thumbs-down Extend the thumb downward to indicate disapproval. relatedTag Move-upper-extremity Thumb-up Extend the thumb upward to indicate approval. relatedTag Move-upper-extremity Wave Raise hand and move left and right, as a greeting or sign of departure. relatedTag Move-upper-extremity Widen-eyes Open eyes and possibly with eyebrows lifted especially to express surprise or fear. relatedTag Move-face Move-eyes Wink Close and open one eye quickly, typically to indicate that something is a joke or a secret or as a signal of affection or greeting. relatedTag Move-face Move-eyes Communicate-musically Communicate using music. Hum Make a low, steady continuous sound like that of a bee. Sing with the lips closed and without uttering speech. Play-instrument Make musical sounds using an instrument. Sing Produce musical tones by means of the voice. Vocalize Utter vocal sounds. Whistle Produce a shrill clear sound by forcing breath out or air in through the puckered lips. Communicate-vocally Communicate using mouth or vocal cords. Cry Shed tears associated with emotions, usually sadness but also joy or frustration. Groan Make a deep inarticulate sound in response to pain or despair. Laugh Make the spontaneous sounds and movements of the face and body that are the instinctive expressions of lively amusement and sometimes also of contempt or derision. Scream Make loud, vociferous cries or yells to express pain, excitement, or fear. Shout Say something very loudly. Sigh Emit a long, deep, audible breath expressing sadness, relief, tiredness, or a similar feeling. Speak Communicate using spoken language. Whisper Speak very softly using breath without vocal cords. Move Move in a specified direction or manner. Change position or posture. Breathe Inhale or exhale during respiration. Blow Expel air through pursed lips. Cough Suddenly and audibly expel air from the lungs through a partially closed glottis, preceded by inhalation. Exhale Blow out or expel breath. Hiccup Involuntarily spasm the diaphragm and respiratory organs, with a sudden closure of the glottis and a characteristic sound like that of a cough. Hold-breath Interrupt normal breathing by ceasing to inhale or exhale. Inhale Draw in with the breath through the nose or mouth. Sneeze Suddenly and violently expel breath through the nose and mouth. Sniff Draw in air audibly through the nose to detect a smell, to stop it from running, or to express contempt. Move-body Move entire body. Bend Move body in a bowed or curved manner. Dance Perform a purposefully selected sequences of human movement often with aesthetic or symbolic value. Move rhythmically to music, typically following a set sequence of steps. Fall-down Lose balance and collapse. Flex Cause a muscle to stand out by contracting or tensing it. Bend a limb or joint. Jerk Make a quick, sharp, sudden movement. Lie-down Move to a horizontal or resting position. Recover-balance Return to a stable, upright body position. Sit-down Move from a standing to a sitting position. Sit-up Move from lying down to a sitting position. Stand-up Move from a sitting to a standing position. Stretch Straighten or extend body or a part of body to its full length, typically so as to tighten muscles or in order to reach something. Shudder Tremble convulsively, sometimes as a result of fear or revulsion. Stumble Trip or momentarily lose balance and almost fall. Turn Change or cause to change direction. Move-body-part Move one part of a body. Move-eyes Move eyes. Blink Shut and open the eyes quickly. Close-eyes Lower and keep eyelids in a closed position. Fixate Direct eyes to a specific point or target. Inhibit-blinks Purposely prevent blinking. Open-eyes Raise eyelids to expose pupil. Saccade Move eyes rapidly between fixation points. Squint Squeeze one or both eyes partly closed in an attempt to see more clearly or as a reaction to strong light. Stare Look fixedly or vacantly at someone or something with eyes wide open. Move-face Move the face or jaw. Bite Seize with teeth or jaws an object or organism so as to grip or break the surface covering. Burp Noisily release air from the stomach through the mouth. Belch. Chew Repeatedly grinding, tearing, and or crushing with teeth or jaws. Gurgle Make a hollow bubbling sound like that made by water running out of a bottle. Swallow Cause or allow something, especially food or drink to pass down the throat. Gulp Swallow quickly or in large mouthfuls, often audibly, sometimes to indicate apprehension. Yawn Take a deep involuntary inhalation with the mouth open often as a sign of drowsiness or boredom. Move-head Move head. Lift-head Tilt head back lifting chin. Lower-head Move head downward so that eyes are in a lower position. Turn-head Rotate head horizontally to look in a different direction. Move-lower-extremity Move leg and/or foot. Curl-toes Bend toes sometimes to grip. Hop Jump on one foot. Jog Run at a trot to exercise. Jump Move off the ground or other surface through sudden muscular effort in the legs. Kick Strike out or flail with the foot or feet. Strike using the leg, in unison usually with an area of the knee or lower using the foot. Pedal Move by working the pedals of a bicycle or other machine. Press-foot Move by pressing foot. Run Travel on foot at a fast pace. Step Put one leg in front of the other and shift weight onto it. Heel-strike Strike the ground with the heel during a step. Toe-off Push with toe as part of a stride. Trot Run at a moderate pace, typically with short steps. Walk Move at a regular pace by lifting and setting down each foot in turn never having both feet off the ground at once. Move-torso Move body trunk. Move-upper-extremity Move arm, shoulder, and/or hand. Drop Let or cause to fall vertically. Grab Seize suddenly or quickly. Snatch or clutch. Grasp Seize and hold firmly. Hold-down Prevent someone or something from moving by holding them firmly. Lift Raising something to higher position. Make-fist Close hand tightly with the fingers bent against the palm. Point Draw attention to something by extending a finger or arm. Press Apply pressure to something to flatten, shape, smooth or depress it. This action tag should be used to indicate key presses and mouse clicks. relatedTag Push Push Apply force in order to move something away. Use Press to indicate a key press or mouse click. relatedTag Press Reach Stretch out your arm in order to get or touch something. Release Make available or set free. Retract Draw or pull back. Scratch Drag claws or nails over a surface or on skin. Snap-fingers Make a noise by pushing second finger hard against thumb and then releasing it suddenly so that it hits the base of the thumb. Touch Come into or be in contact with. Perceive Produce an internal, conscious image through stimulating a sensory system. Hear Give attention to a sound. See Direct gaze toward someone or something or in a specified direction. Smell Inhale in order to ascertain an odor or scent. Taste Sense a flavor in the mouth and throat on contact with a substance. Sense-by-touch Sense something through receptors in the skin. Perform Carry out or accomplish an action, task, or function. Close Act as to blocked against entry or passage. Collide-with Hit with force when moving. Halt Bring or come to an abrupt stop. Modify Change something. Open Widen an aperture, door, or gap, especially one allowing access to something. Operate Control the functioning of a machine, process, or system. Play Engage in activity for enjoyment and recreation rather than a serious or practical purpose. Read Interpret something that is written or printed. Repeat Make do or perform again. Rest Be inactive in order to regain strength, health, or energy. Write Communicate or express by means of letters or symbols written or imprinted on a surface. Think Direct the mind toward someone or something or use the mind actively to form connected ideas. Allow Allow access to something such as allowing a car to pass. Attend-to Focus mental experience on specific targets. Count Tally items either silently or aloud. Deny Refuse to give or grant something requested or desired by someone. Detect Discover or identify the presence or existence of something. Discriminate Recognize a distinction. Encode Convert information or an instruction into a particular form. Evade Escape or avoid, especially by cleverness or trickery. Generate Cause something, especially an emotion or situation to arise or come about. Identify Establish or indicate who or what someone or something is. Imagine Form a mental image or concept of something. Judge Evaluate evidence to make a decision or form a belief. Learn Adaptively change behavior as the result of experience. Memorize Adaptively change behavior as the result of experience. Plan Think about the activities required to achieve a desired goal. Predict Say or estimate that something will happen or will be a consequence of something without having exact informaton. Recognize Identify someone or something from having encountered them before. Respond React to something such as a treatment or a stimulus. Recall Remember information by mental effort. Switch-attention Transfer attention from one focus to another. Track Follow a person, animal, or object through space or time. Item An independently existing thing (living or nonliving). extensionAllowed Biological-item An entity that is biological, that is related to living organisms. Anatomical-item A biological structure, system, fluid or other substance excluding single molecular entities. Body-part Any part of an organism. Head The upper part of the human body, or the front or upper part of the body of an animal, typically separated from the rest of the body by a neck, and containing the brain, mouth, and sense organs. Hair The filamentous outgrowth of the epidermis. Ear A sense organ needed for the detection of sound and for establishing balance. Face The anterior portion of the head extending from the forehead to the chin and ear to ear. The facial structures contain the eyes, nose and mouth, cheeks and jaws. Cheek The fleshy part of the face bounded by the eyes, nose, ear, and jaw line. Chin The part of the face below the lower lip and including the protruding part of the lower jaw. Eye The organ of sight or vision. Eyebrow The arched strip of hair on the bony ridge above each eye socket. Forehead The part of the face between the eyebrows and the normal hairline. Lip Fleshy fold which surrounds the opening of the mouth. Nose A structure of special sense serving as an organ of the sense of smell and as an entrance to the respiratory tract. Mouth The proximal portion of the digestive tract, containing the oral cavity and bounded by the oral opening. Teeth The hard bonelike structures in the jaws. A collection of teeth arranged in some pattern in the mouth or other part of the body. Lower-extremity Refers to the whole inferior limb (leg and/or foot). Ankle A gliding joint between the distal ends of the tibia and fibula and the proximal end of the talus. Calf The fleshy part at the back of the leg below the knee. Foot The structure found below the ankle joint required for locomotion. Big-toe The largest toe on the inner side of the foot. Heel The back of the foot below the ankle. Instep The part of the foot between the ball and the heel on the inner side. Little-toe The smallest toe located on the outer side of the foot. Toes The terminal digits of the foot. Knee A joint connecting the lower part of the femur with the upper part of the tibia. Shin Front part of the leg below the knee. Thigh Upper part of the leg between hip and knee. Torso The body excluding the head and neck and limbs. Torso-back The rear surface of the human body from the shoulders to the hips. Buttocks The round fleshy parts that form the lower rear area of a human trunk. Torso-chest The anterior side of the thorax from the neck to the abdomen. Gentalia The external organs of reproduction. Hip The lateral prominence of the pelvis from the waist to the thigh. Waist The abdominal circumference at the navel. Upper-extremity Refers to the whole superior limb (shoulder, arm, elbow, wrist, hand). Elbow A type of hinge joint located between the forearm and upper arm. Forearm Lower part of the arm between the elbow and wrist. Hand The distal portion of the upper extremity. It consists of the carpus, metacarpus, and digits. Finger Any of the digits of the hand. Index-finger The second finger from the radial side of the hand, next to the thumb. Little-finger The fifth and smallest finger from the radial side of the hand. Middle-finger The middle or third finger from the radial side of the hand. Ring-finger The fourth finger from the radial side of the hand. Thumb The thick and short hand digit which is next to the index finger in humans. Palm The part of the inner surface of the hand that extends from the wrist to the bases of the fingers. Knuckles A part of a finger at a joint where the bone is near the surface, especially where the finger joins the hand. Shoulder Joint attaching upper arm to trunk. Upper-arm Portion of arm between shoulder and elbow. Wrist A joint between the distal end of the radius and the proximal row of carpal bones. Organism A living entity, more specifically a biological entity that consists of one or more cells and is capable of genomic replication (independently or not). Animal A living organism that has membranous cell walls, requires oxygen and organic foods, and is capable of voluntary movement. Human The bipedal primate mammal Homo sapiens. Plant Any living organism that typically synthesizes its food from inorganic substances and possesses cellulose cell walls. Language-item An entity related to a systematic means of communicating by the use of sounds, symbols, or gestures. suggestedTag Attribute/Sensory Character A mark or symbol used in writing. Clause A unit of grammatical organization next below the sentence in rank, usually consisting of a subject and predicate. Glyph A hieroglyphic character, symbol, or pictograph. Nonword A group of letters or speech sounds that looks or sounds like a word but that is not accepted as such by native speakers. Paragraph A distinct section of a piece of writing, usually dealing with a single theme. Phoneme A speech sound that is distinguished by the speakers of a particular language. Phrase A phrase is a group of words functioning as a single unit in the syntax of a sentence. Sentence A set of words that is complete in itself, conveying a statement, question, exclamation, or command and typically containing an explicit or implied subject and a predicate containing a finite verb. Syllable A unit of spoken language larger than a phoneme. Textblock A block of text. Word A word is the smallest free form (an item that may be expressed in isolation with semantic or pragmatic content) in a language. Object Something perceptible by one or more of the senses, especially by vision or touch. A material thing. suggestedTag Attribute/Sensory Geometric-object An object or a representation that has structure and topology in space. Pattern An arrangement of objects, facts, behaviors, or other things which have scientific, mathematical, geometric, statistical, or other meaning. Dots A small round mark or spot. LED-pattern A pattern created by lighting selected members of a fixed light emitting diode array. 2D-shape A planar, two-dimensional shape. Clockface The dial face of a clock. A location identifier based on clockface numbering or anatomic subregion. Cross A figure or mark formed by two intersecting lines crossing at their midpoints. Dash A horizontal stroke in writing or printing to mark a pause or break in sense or to represent omitted letters or words. Ellipse A closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it, especially a plane not parallel to the base. Circle A ring-shaped structure with every point equidistant from the center. Rectangle A parallelogram with four right angles. Square A square is a special rectangle with four equal sides. Single-point A point is a geometric entity that is located in a zero-dimensional spatial region and whose position is defined by its coordinates in some coordinate system. Star A conventional or stylized representation of a star, typically one having five or more points. Triangle A three-sided polygon. 3D-shape A geometric three-dimensional shape. Box A square or rectangular vessel, usually made of cardboard or plastic. Cube A solid or semi-solid in the shape of a three dimensional square. Cone A shape whose base is a circle and whose sides taper up to a point. Cylinder A surface formed by circles of a given radius that are contained in a plane perpendicular to a given axis, whose centers align on the axis. Ellipsoid A closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it, especially a plane not parallel to the base. Sphere A solid or hollow three-dimensional object bounded by a closed surface such that every point on the surface is equidistant from the center. Pyramid A polyhedron of which one face is a polygon of any number of sides, and the other faces are triangles with a common vertex. Ingestible-object Something that can be taken into the body by the mouth for digestion or absorption. Man-made-object Something constructed by human means. Building A structure that has a roof and walls and stands more or less permanently in one place. Room An area within a building enclosed by walls and floor and ceiling. Roof A roof is the covering on the uppermost part of a building which provides protection from animals and weather, notably rain, but also heat, wind and sunlight. Entrance The means or place of entry. Attic A room or a space immediately below the roof of a building. Basement The part of a building that is wholly or partly below ground level. Clothing A covering designed to be worn on the body. Device An object contrived for a specific purpose. Assistive-device A device that help an individual accomplish a task. Glasses Frames with lenses worn in front of the eye for vision correction, eye protection, or protection from UV rays. Writing-device A device used for writing. Pen A common writing instrument used to apply ink to a surface for writing or drawing. Pencil An implement for writing or drawing that is constructed of a narrow solid pigment core in a protective casing that prevents the core from being broken or marking the hand. Computing-device An electronic device which take inputs and processes results from the inputs. Cellphone A telephone with access to a cellular radio system so it can be used over a wide area, without a physical connection to a network. Desktop-computer A computer suitable for use at an ordinary desk. Laptop-computer A computer that is portable and suitable for use while traveling. Tablet-computer A small portable computer that accepts input directly on to its screen rather than via a keyboard or mouse. Engine A motor is a machine designed to convert one or more forms of energy into mechanical energy. IO-device Hardware used by a human (or other system) to communicate with a computer. Input-device A piece of equipment used to provide data and control signals to an information processing system such as a computer or information appliance. Computer-mouse A hand-held pointing device that detects two-dimensional motion relative to a surface. Mouse-button An electric switch on a computer mouse which can be pressed or clicked to select or interact with an element of a graphical user interface. Scroll-wheel A scroll wheel or mouse wheel is a wheel used for scrolling made of hard plastic with a rubbery surface usually located between the left and right mouse buttons and is positioned perpendicular to the mouse surface. Joystick A control device that uses a movable handle to create two-axis input for a computer device. Keyboard A device consisting of mechanical keys that are pressed to create input to a computer. Keyboard-key A button on a keyboard usually representing letters, numbers, functions, or symbols. # Value of a keyboard key. takesValue Keypad A device consisting of keys, usually in a block arrangement, that provides limited input to a system. Keypad-key A key on a separate section of a computer keyboard that groups together numeric keys and those for mathematical or other special functions in an arrangement like that of a calculator. # Value of keypad key. takesValue Microphone A device designed to convert sound to an electrical signal. Push-button A switch designed to be operated by pressing a button. Output-device Any piece of computer hardware equipment which converts information into human understandable form. Display-device An output device for presentation of information in visual or tactile form the latter used for example in tactile electronic displays for blind people. Head-mounted-display An instrument that functions as a display device, worn on the head or as part of a helmet, that has a small display optic in front of one (monocular HMD) or each eye (binocular HMD). LED-display A LED display is a flat panel display that uses an array of light-emitting diodes as pixels for a video display. Computer-screen An electronic device designed as a display or a physical device designed to be a protective meshwork. Screen-window A part of a computer screen that contains a display different from the rest of the screen. A window is a graphical control element consisting of a visual area containing some of the graphical user interface of the program it belongs to and is framed by a window decoration. Auditory-device A device designed to produce sound. Headphones An instrument that consists of a pair of small loudspeakers, or less commonly a single speaker, held close to ears and connected to a signal source such as an audio amplifier, radio, CD player or portable media player. Loudspeaker A device designed to convert electrical signals to sounds that can be heard. Recording-device A device that copies information in a signal into a persistent information bearer. EEG-recorder A device for recording electric currents in the brain using electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain. File-storage A device for recording digital information to a permanent media. MEG-recorder A device for measuring the magnetic fields produced by electrical activity in the brain, usually conducted externally. Motion-capture A device for recording the movement of objects or people. Tape-recorder A device for recording and reproduction usually using magnetic tape for storage that can be saved and played back. Touchscreen A control component that operates an electronic device by pressing the display on the screen. Machine A human-made device that uses power to apply forces and control movement to perform an action. Measurement-device A device in which a measure function inheres. Clock A device designed to indicate the time of day or to measure the time duration of an event or action. Clock-face A location identifier based on clockface numbering or anatomic subregion. Robot A mechanical device that sometimes resembles a living animal and is capable of performing a variety of often complex human tasks on command or by being programmed in advance. Tool A component that is not part of a device but is designed to support its assemby or operation. Document A physical object, or electronic counterpart, that is characterized by containing writing which is meant to be human-readable. Letter A written message addressed to a person or organization. Note A brief written record. Book A volume made up of pages fastened along one edge and enclosed between protective covers. Notebook A book for notes or memoranda. Furnishing Furniture, fittings, and other decorative accessories, such as curtains and carpets, for a house or room. Manufactured-material Substances created or extracted from raw materials. Ceramic A hard, brittle, heat-resistant and corrosion-resistant material made by shaping and then firing a nonmetallic mineral, such as clay, at a high temperature. Glass A brittle transparent solid with irregular atomic structure. Paper A thin sheet material produced by mechanically or chemically processing cellulose fibres derived from wood, rags, grasses or other vegetable sources in water. Plastic Various high-molecular-weight thermoplastic or thermosetting polymers that are capable of being molded, extruded, drawn, or otherwise shaped and then hardened into a form. Steel An alloy made up of iron with typically a few tenths of a percent of carbon to improve its strength and fracture resistance compared to iron. Media Media are audo/visual/audiovisual modes of communicating information for mass consumption. Media-clip A short segment of media. Audio-clip A short segment of audio. Audiovisual-clip A short media segment containing both audio and video. Video-clip A short segment of video. Visualization An planned process that creates images, diagrams or animations from the input data. Animation A form of graphical illustration that changes with time to give a sense of motion or represent dynamic changes in the portrayal. Art-installation A large-scale, mixed-media constructions, often designed for a specific place or for a temporary period of time. Braille A display using a system of raised dots that can be read with the fingers by people who are blind. Image Any record of an imaging event whether physical or electronic. Cartoon A type of illustration, sometimes animated, typically in a non-realistic or semi-realistic style. The specific meaning has evolved over time, but the modern usage usually refers to either an image or series of images intended for satire, caricature, or humor. A motion picture that relies on a sequence of illustrations for its animation. Drawing A representation of an object or outlining a figure, plan, or sketch by means of lines. Icon A sign (such as a word or graphic symbol) whose form suggests its meaning. Painting A work produced through the art of painting. Photograph An image recorded by a camera. Movie A sequence of images displayed in succession giving the illusion of continuous movement. Outline-visualization A visualization consisting of a line or set of lines enclosing or indicating the shape of an object in a sketch or diagram. Point-light-visualization A display in which action is depicted using a few points of light, often generated from discrete sensors in motion capture. Sculpture A two- or three-dimensional representative or abstract forms, especially by carving stone or wood or by casting metal or plaster. Stick-figure-visualization A drawing showing the head of a human being or animal as a circle and all other parts as straight lines. Navigational-object An object whose purpose is to assist directed movement from one location to another. Path A trodden way. A way or track laid down for walking or made by continual treading. Road An open way for the passage of vehicles, persons, or animals on land. Lane A defined path with physical dimensions through which an object or substance may traverse. Runway A paved strip of ground on a landing field for the landing and takeoff of aircraft. Vehicle A mobile machine which transports people or cargo. Aircraft A vehicle which is able to travel through air in an atmosphere. Bicycle A human-powered, pedal-driven, single-track vehicle, having two wheels attached to a frame, one behind the other. Boat A watercraft of any size which is able to float or plane on water. Car A wheeled motor vehicle used primarily for the transportation of human passengers. Cart A cart is a vehicle which has two wheels and is designed to transport human passengers or cargo. Tractor A mobile machine specifically designed to deliver a high tractive effort at slow speeds, and mainly used for the purposes of hauling a trailer or machinery used in agriculture or construction. Train A connected line of railroad cars with or without a locomotive. Truck A motor vehicle which, as its primary funcion, transports cargo rather than human passangers. Natural-object Something that exists in or is produced by nature, and is not artificial or man-made. Mineral A solid, homogeneous, inorganic substance occurring in nature and having a definite chemical composition. Natural-feature A feature that occurs in nature. A prominent or identifiable aspect, region, or site of interest. Field An unbroken expanse as of ice or grassland. Hill A rounded elevation of limited extent rising above the surrounding land with local relief of less than 300m. Mountain A landform that extends above the surrounding terrain in a limited area. River A natural freshwater surface stream of considerable volume and a permanent or seasonal flow, moving in a definite channel toward a sea, lake, or another river. Waterfall A sudden descent of water over a step or ledge in the bed of a river. Sound Mechanical vibrations transmitted by an elastic medium. Something that can be heard. Environmental-sound Sounds occuring in the environment. An accumulation of noise pollution that occurs outside. This noise can be caused by transport, industrial, and recreational activities. Crowd-sound Noise produced by a mixture of sounds from a large group of people. Signal-noise Any part of a signal that is not the true or original signal but is introduced by the communication mechanism. Musical-sound Sound produced by continuous and regular vibrations, as opposed to noise. Tone A musical note, warble, or other sound used as a particular signal on a telephone or answering machine. Instrument-sound Sound produced by a musical instrument. Vocalized-sound Musical sound produced by vocal cords in a biological agent. Named-animal-sound A sound recognizable as being associated with particular animals. Barking Sharp explosive cries like sounds made by certain animals, especially a dog, fox, or seal. Bleating Wavering cries like sounds made by a sheep, goat, or calf. Crowing Loud shrill sounds characteristic of roosters. Chirping Short, sharp, high-pitched noises like sounds made by small birds or an insects. Growling Low guttural sounds like those that made in the throat by a hostile dog or other animal. Meowing Vocalizations like those made by as those cats. These sounds have diverse tones and are sometimes chattered, murmured or whispered. The purpose can be assertive. Mooing Deep vocal sounds like those made by a cow. Purring Low continuous vibratory sound such as those made by cats. The sound expresses contentment. Roaring Loud, deep, or harsh prolonged sounds such as those made by big cats and bears for long-distance communication and intimidation. Squawking Loud, harsh noises such as those made by geese. Named-object-sound A sound identifiable as coming from a particular type of object. Alarm-sound A loud signal often loud continuous ringing to alert people to a problem or condition that requires urgent attention. Beep A short, single tone, that is typically high-pitched and generally made by a computer or other machine. Buzz A persistent vibratory sound often made by a buzzer device and used to indicate something incorrect. Ka-ching The sound made by a mechanical cash register, often to designate a reward. Click The sound made by a mechanical cash register, often to designate a reward. Ding A short ringing sound such as that made by a bell, often to indicate a correct response or the expiration of time. Horn-blow A loud sound made by forcing air through a sound device that funnels air to create the sound, often used to sound an alert. Siren A loud, continuous sound often varying in frequency designed to indicate an emergency. Property Something that pertains to a thing. A characteristic of some entity. A quality or feature regarded as a characteristic or inherent part of someone or something. HED attributes are adjectives or adverbs. extensionAllowed Agent-property Something that pertains to an agent. extensionAllowed Agent-state The state of the agent. Agent-cognitive-state The state of the cognitive processes or state of mind of the agent. Alert Condition of heightened watchfulness or preparation for action. Anesthetized Having lost sensation to pain or having senses dulled due to the effects of an anesthetic. Asleep Having entered a periodic, readily reversible state of reduced awareness and metabolic activity, usually accompanied by physical relaxation and brain activity. Attentive Concentrating and focusing mental energy on the task or surroundings. Awake In a non sleeping state. Brain-dead Characterized by the irreversible absence of cortical and brain stem functioning. Comatose In a state of profound unconsciousness associated with markedly depressed cerebral activity. Drowsy In a state of near-sleep, a strong desire for sleep, or sleeping for unusually long periods. Intoxicated In a state with disturbed psychophysiological functions and responses as a result of administration or ingestion of a psychoactive substance. Locked-in In a state of complete paralysis of all voluntary muscles except for the ones that control the movements of the eyes. Passive Not responding or initiating an action in response to a stimulus. Resting A state in which the agent is not exhibiting any physical exertion. Vegetative A state of wakefulness and conscience, but (in contrast to coma) with involuntary opening of the eyes and movements (such as teeth grinding, yawning, or thrashing of the extremities). Agent-emotional-state The status of the general temperament and outlook of an agent. Angry Experiencing emotions characterized by marked annoyance or hostility. Aroused In a state reactive to stimuli leading to increased heart rate and blood pressure, sensory alertness, mobility and readiness to respond. Awed Filled with wonder. Feeling grand, sublime or powerful emotions characterized by a combination of joy, fear, admiration, reverence, and/or respect. Compassionate Feeling or showing sympathy and concern for others often evoked for a person who is in distress and associated with altruistic motivation. Content Feeling satisfaction with things as they are. Disgusted Feeling revulsion or profound disapproval aroused by something unpleasant or offensive. Emotionally-neutral Feeling neither satisfied nor dissatisfied. Empathetic Understanding and sharing the feelings of another. Being aware of, being sensitive to, and vicariously experiencing the feelings, thoughts, and experience of another. Excited Feeling great enthusiasm and eagerness. Fearful Feeling apprehension that one may be in danger. Frustrated Feeling annoyed as a result of being blocked, thwarted, disappointed or defeated. Grieving Feeling sorrow in response to loss, whether physical or abstract. Happy Feeling pleased and content. Jealous Feeling threatened by a rival in a relationship with another individual, in particular an intimate partner, usually involves feelings of threat, fear, suspicion, distrust, anxiety, anger, betrayal, and rejection. Joyful Feeling delight or intense happiness. Loving Feeling a strong positive emotion of affection and attraction. Relieved No longer feeling pain, distress, anxiety, or reassured. Sad Feeling grief or unhappiness. Stressed Experiencing mental or emotional strain or tension. Agent-physiological-state Having to do with the mechanical, physical, or biochemical function of an agent. Healthy Having no significant health-related issues. relatedTag Sick Hungry Being in a state of craving or desiring food. relatedTag Sated Thirsty Rested Feeling refreshed and relaxed. relatedTag Tired Sated Feeling full. relatedTag Hungry Sick Being in a state of ill health, bodily malfunction, or discomfort. relatedTag Healthy Thirsty Feeling a need to drink. relatedTag Hungry Tired Feeling in need of sleep or rest. relatedTag Rested Agent-postural-state Pertaining to the position in which agent holds their body. Crouching Adopting a position where the knees are bent and the upper body is brought forward and down, sometimes to avoid detection or to defend oneself. Eyes-closed Keeping eyes closed with no blinking. Eyes-open Keeping eyes open with occasional blinking. Kneeling Positioned where one or both knees are on the ground. On-treadmill Ambulation on an exercise apparatus with an endless moving belt to support moving in place. Prone Positioned in a recumbent body position whereby the person lies on its stomach and faces downward. Sitting In a seated position. Standing Assuming or maintaining an erect upright position. Seated-with-chin-rest Using a device that supports the chin and head. Agent-task-role The function or part that is ascribed to an agent in performing the task. Experiment-actor An agent who plays a predetermined role to create the experiment scenario. Experiment-controller An agent exerting control over some aspect of the experiment. Experiment-participant Someone who takes part in an activity related to an experiment. Experimenter Person who is the owner of the experiment and has its responsibility. Agent-trait A genetically, environmentally, or socially determined characteristic of an agent. Age Length of time elapsed time since birth of the agent. # takesValue Agent-experience-level Amount of skill or knowledge that the agent has as pertains to the task. Expert-level Having comprehensive and authoritative knowledge of or skill in a particular area related to the task. relatedTag Intermediate-experience-level Novice-level Intermediate-experience-level Having a moderate amount of knowledge or skill related to the task. relatedTag Expert-level Novice-level Novice-level Being inexperienced in a field or situation related to the task. relatedTag Expert-level Intermediate-experience-level Gender Characteristics that are socially constructed, including norms, behaviors, and roles based on sex. Sex Physical properties or qualities by which male is distinguished from female. Female Biological sex of an individual with female sexual organs such ova. Male Biological sex of an individual with male sexual organs producing sperm. Intersex Having genitalia and/or secondary sexual characteristics of indeterminate sex. Handedness Individual preference for use of a hand, known as the dominant hand. Left-handed Preference for using the left hand or foot for tasks requiring the use of a single hand or foot. Right-handed Preference for using the right hand or foot for tasks requiring the use of a single hand or foot. Ambidextrous Having no overall dominance in the use of right or left hand or foot in the performance of tasks that require one hand or foot. Data-property Something that pertains to data or information. extensionAllowed Data-marker An indicator placed to mark something. Temporal-marker An indicator placed at a particular time in the data. Onset Labels the start or beginning of something, usually an event. topLevelTagGroup Offset Labels the time at which something stops. topLevelTagGroup Pause Indicates the temporary interruption of the operation a process and subsequently wait for a signal to continue. Time-out A cancellation or cessation that automatically occurs when a predefined interval of time has passed without a certain event occurring. Time-sync A synchronization signal whose purpose to help synchronize different signals or processes. Often used to indicate a marker inserted into the recorded data to allow post hoc synchronization of concurrently recorded data streams. Data-resolution Smallest change in a quality being measured by an sensor that causes a perceptible change. Printer-resolution Resolution of a printer, usually expressed as the number of dots-per-inch for a printer. # takesValue Screen-resolution Resolution of a screen, usually expressed as the of pixels in a dimension for a digital display device. # takesValue Sensory-resolution Resolution of measurements by a sensing device. # takesValue Spatial-resolution Linear spacing of a spatial measurement. # takesValue Spectral-resolution Measures the ability of a sensor to resolve features in the electromagnetic spectrum. # takesValue Temporal-resolution Measures the ability of a sensor to resolve features in time. # takesValue Data-source-type The type of place, person, or thing from which the data comes or can be obtained. Computed-feature A feature computed from the data by a tool. This tag should be grouped with a label of the form Toolname_propertyName. Computed-prediction A computed extrapolation of known data. Expert-annotation An explanatory or critical comment or other in-context information provided by an authority. Instrument-measurement Information obtained from a device that is used to measure material properties or make other observations. Observation Active acquisition of information from a primary source. Should be grouped with a label of the form AgentID_featureName. Data-value Designation of the type of a data item. Categorical-value Indicates that something can take on a limited and usually fixed number of possible values. Categorical-class-value Categorical values that fall into discrete classes such as true or false. The grouping is absolute in the sense that it is the same for all participants. All To a complete degree or to the full or entire extent. relatedTag Some None Correct Free from error. Especially conforming to fact or truth. relatedTag Incorrect Explicit Stated clearly and in detail, leaving no room for confusion or doubt. relatedTag Implicit False Not in accordance with facts, reality or definitive criteria. relatedTag True Implicit Implied though not plainly expressed. relatedTag Explicit Invalid Not true because based on erroneous information or unsound reasoning or not conforming to the correct format or specifications. relatedTag Valid None No person or thing, nobody, not any. relatedTag All Some Some At least a small amount or number of, but not a large amount of, or often. relatedTag All None True Conforming to facts, reality or definitive criteria. relatedTag False Valid Allowable, usable, or acceptable. relatedTag Invalid Wrong Not accurate, correct, or appropriate. relatedTag Correct Categorical-judgment-value Categorical values that are based on the judgment or perception of the participant such familiar and famous. Abnormal Deviating in any way from the state, position, structure, condition, behavior, or rule which is considered a norm. relatedTag Normal Asymmetrical Lacking symmetry or having parts that fail to correspond to one another in shape, size, or arrangement. relatedTag Symmetrical Audible A sound that can be perceived by the participant. relatedTag Inaudible Congruent Concordance of multiple evidence lines. In agreement or harmony. relatedTag Incongruent Complex Hard, involved or complicated, elaborate, having many parts. relatedTag Simple Constrained Keeping something within particular limits or bounds. relatedTag Unconstrained Disordered Not neatly arranged. Confused and untidy. A structural quality in which the parts of an object are non-rigid. relatedTag Ordered Familiar Recognized, familiar, or within the scope of knowledge. relatedTag Unfamiliar Famous Famous A person who has a high degree of recognition by the general population for his or her success or accomplishments. A famous person. relatedTag Familiar Unfamiliar Inaudible A sound below the threshold of perception of the participant. relatedTag Audible Incongruent Not in agreement or harmony. relatedTag Congruent Involuntary An action that is not made by choice. In the body, involuntary actions (such as blushing) occur automatically, and cannot be controlled by choice. relatedTag Voluntary Masked Information exists but is not provided or is partially obscured due to security, privacy, or other concerns. relatedTag Unmasked Normal Being approximately average or within certain limits. Conforming with or constituting a norm or standard or level or type or social norm. relatedTag Abnormal Ordered Conforming to a logical or comprehensible arrangement of separate elements. relatedTag Disordered Simple Easily understood or presenting no difficulties. relatedTag Complex Symmetrical Made up of exactly similar parts facing each other or around an axis. Showing aspects of symmetry. relatedTag Asymmetrical Unconstrained Moving without restriction. relatedTag Constrained Unfamiliar Not having knowledge or experience of. relatedTag Familiar Famous Unmasked Information is revealed. relatedTag Masked Voluntary Using free will or design; not forced or compelled; controlled by individual volition. relatedTag Involuntary Categorical-level-value Categorical values based on dividing a continuous variable into levels such as high and low. Cold Characterized by an absence of heat. relatedTag Hot Deep Extending relatively far inward or downward. relatedTag Shallow High Having a greater than normal degree, intensity, or amount. relatedTag Low Medium Hot Characterized by an excess of heat. relatedTag Cold Liminal Situated at a sensory threshold that is barely perceptible or capable of eliciting a response. relatedTag Subliminal Supraliminal Loud Characterizing a perceived high intensity of sound. relatedTag Quiet Low Less than normal in degree, intensity or amount. relatedTag High Medium Mid-way between small and large in number, quantity, magnitude or extent. relatedTag Low High Negative Involving disadvantage or harm. relatedTag Positive Positive Involving advantage or good. relatedTag Negative Quiet Characterizing a perceived low intensity of sound. relatedTag Loud Rough Having a surface with perceptible bumps, ridges, or irregularities. relatedTag Smooth Shallow Having a depth which is relatively low. relatedTag Deep Smooth Having a surface free from bumps, ridges, or irregularities. relatedTag Rough Subliminal Situated below a sensory threshold that is imperceptible or not capable of eliciting a response. relatedTag Liminal Supraliminal Supraliminal Situated above a sensory threshold that is perceptible or capable of eliciting a response. relatedTag Liminal Subliminal Thick Wide in width, extent or cross-section. relatedTag Thin Thin Narrow in width, extent or cross-section. relatedTag Thick Categorical-orientation-value Value indicating the orientation or direction of something. Backward Directed behind or to the rear. relatedTag Forward Downward Moving or leading toward a lower place or level. relatedTag Leftward Rightward Upward Forward At or near or directed toward the front. relatedTag Backward Horizontally-oriented Oriented parallel to or in the plane of the horizon. Leftward Going toward or facing the left. relatedTag Downward Rightward Upward Oblique Slanting or inclined in direction, course, or position that is neither parallel nor perpendicular nor right-angular. relatedTag Rotated Rightward Going toward or situated on the right. relatedTag Downward Leftward Upward Rotated Positioned offset around an axis or center. Upward Moving, pointing, or leading to a higher place, point, or level. relatedTag Downward Leftward Rightward Vertically-oriented Oriented perpendicular to the plane of the horizon. Physical-value The value of some physical property of something. Weight The relative mass or the quantity of matter contained by something. # takesValue unitClass weightUnits valueClass numericClass Quantitative-value Something capable of being estimated or expressed with numeric values. Fraction A numerical value betwee 0 and 1. # takesValue valueClass numericClass Item-count The integer count of something which is usually grouped with the entity it is counting. (Item-count/3, A) indicates that 3 of A have occurred up to this point. # takesValue valueClass numericClass Item-interval An integer indicating how many items or entities have passed since the last one of these. An item interval of 0 indicates the current item. # takesValue valueClass numericClass Percentage A fraction or ratio with 100 understood as the denominator. # takesValue valueClass numericClass Ratio A quotient of quantities of the same kind for different components within the same system. # takesValue valueClass numericClass Statistical-value A value based on or employing the principles of statistics. extensionAllowed Data-maximum The largest possible quantity or degree. # takesValue valueClass numericClass Data-mean The sum of a set of values divided by the number of values in the set. # takesValue valueClass numericClass Data-median The value which has an equal number of values greater and less than it. # takesValue valueClass numericClass Data-minimum The smallest possible quantity. # takesValue valueClass numericClass Probability A measure of the expectation of the occurrence of a particular event. # takesValue valueClass numericClass Standard-deviation A measure of the range of values in a set of numbers. Standard deviation is a statistic used as a measure of the dispersion or variation in a distribution, equal to the square root of the arithmetic mean of the squares of the deviations from the arithmetic mean. # takesValue valueClass numericClass Statistical-accuracy A measure of closeness to true value expressed as a number between 0 and 1. # takesValue valueClass numericClass Statistical-precision A quantitative representation of the degree of accuracy necessary for or associated with a particular action. # takesValue valueClass numericClass Statistical-recall Sensitivity is a measurement datum qualifying a binary classification test and is computed by substracting the false negative rate to the integral numeral 1. # takesValue valueClass numericClass Statistical-uncertainty A measure of the inherent variability of repeated observation measurements of a quantity including quantities evaluated by statistical methods and by other means. # takesValue valueClass numericClass Spatiotemporal-value A property relating to space and/or time. Rate-of-change The amount of change accumulated per unit time. Acceleration Magnitude of the rate of change in either speed or direction. The direction of change should be given separately. # takesValue unitClass accelerationUnits valueClass numericClass Frequency Frequency is the number of occurrences of a repeating event per unit time. # takesValue unitClass frequencyUnits valueClass numericClass Jerk-rate Magnitude of the rate at which the acceleration of an object changes with respect to time. The direction of change should be given separately. # takesValue unitClass jerkUnits valueClass numericClass Sampling-rate The number of digital samples taken or recorded per unit of time. # takesValue unitClass frequencyUnits Refresh-rate The frequency with which the image on a computer monitor or similar electronic display screen is refreshed, usually expressed in hertz. # takesValue valueClass numericClass Speed A scalar measure of the rate of movement of the object expressed either as the distance travelled divided by the time taken (average speed) or the rate of change of position with respect to time at a particular point (instantaneous speed). The direction of change should be given separately. # takesValue unitClass speedUnits valueClass numericClass Temporal-rate The number of items per unit of time. # takesValue unitClass frequencyUnits valueClass numericClass Spatial-value Value of an item involving space. Angle The amount of inclination of one line to another or the plane of one object to another. unitClass angleUnits # takesValue valueClass numericClass Distance A measure of the space separating two objects or points. # takesValue unitClass physicalLengthUnits valueClass numericClass Position A reference to the alignment of an object, a particular situation or view of a situation, or the location of an object. Coordinates with respect a specified frame of reference or the default Screen-frame if no frame is given. X-position The position along the x-axis of the frame of reference. # takesValue unitClass physicalLengthUnits valueClass numericClass Y-position The position along the y-axis of the frame of reference. # takesValue unitClass physicalLengthUnits valueClass numericClass Z-position The position along the z-axis of the frame of reference. # takesValue unitClass physicalLengthUnits valueClass numericClass Size The physical magnitude of something. Area The extent of a 2-dimensional surface enclosed within a boundary. # takesValue unitClass areaUnits valueClass numericClass Depth The distance from the surface of something especially from the perspective of looking from the front. # takesValue unitClass physicalLengthUnits valueClass numericClass Length The linear extent in space from one end of something to the other end, or the extent of something from beginning to end. # takesValue unitClass physicalLengthUnits valueClass numericClass Width The extent or measurement of something from side to side. # takesValue unitClass physicalLengthUnits valueClass numericClass Height The vertical measurement or distance from the base to the top of an object. # takesValue unitClass physicalLengthUnits valueClass numericClass Volume The amount of three dimensional space occupied by an object or the capacity of a space or container. # takesValue unitClass volumeUnits valueClass numericClass Temporal-value A characteristic of or relating to time or limited by time. Delay Time during which some action is awaited. # takesValue unitClass timeUnits valueClass numericClass Duration The period of time during which something occurs or continues. # takesValue unitClass timeUnits valueClass numericClass Time-interval The period of time separating two instances, events, or occurrences. # takesValue unitClass timeUnits valueClass numericClass Time-value A value with units of time. Usually grouped with tags identifying what the value represents. # takesValue unitClass timeUnits valueClass numericClass Data-variability-attribute An attribute describing how something changes or varies. Abrupt Marked by sudden change. Constant Continually recurring or continuing without interruption. Not changing in time or space. Continuous Uninterrupted in time, sequence, substance, or extent. relatedTag Discrete Discontinuous Decreasing Becoming smaller or fewer in size, amount, intensity, or degree. relatedTag Increasing Deterministic No randomness is involved in the development of the future states of the element. relatedTag Random Stochastic Discontinuous Having a gap in time, sequence, substance, or extent. relatedTag Continuous Discrete Constituting a separate entities or parts. relatedTag Continuous Discontinuous Flickering Moving irregularly or unsteadily or burning or shining fitfully or with a fluctuating light. Estimated-value Something that has been calculated or measured approximately. Exact-value A value that is viewed to the true value according to some standard. Fractal Having extremely irregular curves or shapes for which any suitably chosen part is similar in shape to a given larger or smaller part when magnified or reduced to the same size. Increasing Becoming greater in size, amount, or degree. relatedTag Decreasing Random Governed by or depending on chance. Lacking any definite plan or order or purpose. relatedTag Deterministic Stochastic Repetitive A recurring action that is often non-purposeful. Stochastic Uses a random probability distribution or pattern that may be analysed statistically but may not be predicted precisely to determine future states. relatedTag Deterministic Random Varying Differing in size, amount, degree, or nature. Environmental-property Relating to or arising from the surroundings of an agent. Indoors Located inside a building or enclosure. Outdoors Any area outside a building or shelter. Real-world Located in a place that exists in real space and time under realistic conditions. Virtual-world Using technology that creates immersive, computer-generated experiences that a person can interact with and navigate through. The digital content is generally delivered to the user through some type of headset and responds to changes in head position or through interaction with other types of sensors. Existing in a virtual setting such as a simulation or game environment. Augmented-reality Using technology that enhances real-world experiences with computer-derived digital overlays to change some aspects of perception of the natural environment. The digital content is shown to the user through a smart device or glasses and responds to changes in the environment. Motion-platform A mechanism that creates the feelings of being in a real motion environment. Urban Relating to, located in, or characteristic of a city or densely populated area. Rural Of or pertaining to the country as opposed to the city. Terrain Characterization of the physical features of a tract of land. Composite-terrain Tracts of land characterized by a mixure of physical features. Dirt-terrain Tracts of land characterized by a soil surface and lack of vegetation. Grassy-terrain Tracts of land covered by grass. Gravel-terrain Tracts of land covered by a surface consisting a loose aggregation of small water-worn or pounded stones. Leaf-covered-terrain Tracts of land covered by leaves and composited organic material. Muddy-terrain Tracts of land covered by a liquid or semi-liquid mixture of water and some combination of soil, silt, and clay. Paved-terrain Tracts of land covered with concrete, asphalt, stones, or bricks. Rocky-terrain Tracts of land consisting or full of rock or rocks. Sloped-terrain Tracts of land arranged in a sloping or inclined position. Uneven-terrain Tracts of land that are not level, smooth, or regular. Informational-property Something that pertains to a task. extensionAllowed Description An explanation of what the tag group it is in means. If the description is at the top-level of an event string, the description applies to the event. requireChild # takesValue valueClass textClass ID An alphanumeric name that identifies either a unique object or a unique class of objects. Here the object or class may be an idea, physical countable object (or class), or physical uncountable substance (or class). requireChild # takesValue valueClass textClass Label A string of 20 or fewer characters identifying something. Labels usually refer to general classes of things while IDs refer to specific instances. A term that is associated with some entity. A brief description given for purposes of identification. An identifying or descriptive marker that is attached to an object. requireChild # takesValue valueClass nameClass Metadata Data about data. Information that describes another set of data. CogAtlas The Cognitive Atlas ID number of something. # takesValue CogPo The CogPO ID number of something. # takesValue Creation-date The date on which data creation of this element began. requireChild # takesValue valueClass dateTimeClass Experimental-note A brief written record about the experiment. # takesValue valueClass textClass Library-name Official name of a HED library. # takesValue valueClass nameClass OBO-identifier The identifier of a term in some Open Biology Ontology (OBO) ontology. # takesValue valueClass nameClass Pathname The specification of a node (file or directory) in a hierarchical file system, usually specified by listing the nodes top-down. # takesValue Subject-identifier A sequence of characters used to identify, name, or characterize a trial or study subject. # takesValue Version-identifier An alphanumeric character string that identifies a form or variant of a type or original. # Usually is a semantic version. takesValue Parameter Something user-defined for this experiment. Parameter-label The name of the parameter. # takesValue valueClass labelClass Parameter-value The value of the parameter. # takesValue valueClass textClass Organizational-property Relating to an organization or the action of organizing something. Collection A tag designating a grouping of items such as in a set or list. # Name of the collection. takesValue valueClass nameClass Condition-variable An aspect of the experiment or task that is to be varied during the experiment. Task-conditions are sometimes called independent variables or contrasts. # Name of the condition variable. takesValue valueClass nameClass Control-variable An aspect of the experiment that is fixed throughout the study and usually is explicitly controlled. # Name of the control variable. takesValue valueClass nameClass Def A HED-specific utility tag used with a defined name to represent the tags associated with that definition. requireChild # Name of the definition. takesValue valueClass nameClass Def-expand A HED specific utility tag that is grouped with an expanded definition. The child value of the Def-expand is the name of the expanded definition. requireChild tagGroup # takesValue valueClass nameClass Definition A HED-specific utility tag whose child value is the name of the concept and the tag group associated with the tag is an English language explanation of a concept. requireChild topLevelTagGroup # Name of the definition. takesValue valueClass nameClass Event-context A special HED tag inserted as part of a top-level tag group to contain information about the interrelated conditions under which the event occurs. The event context includes information about other events that are ongoing when this event happens. topLevelTagGroup unique Event-stream A special HED tag indicating that this event is a member of an ordered succession of events. # Name of the event stream. takesValue valueClass nameClass Experimental-intertrial A tag used to indicate a part of the experiment between trials usually where nothing is happening. # Optional label for the intertrial block. takesValue valueClass nameClass Experimental-trial Designates a run or execution of an activity, for example, one execution of a script. A tag used to indicate a particular organizational part in the experimental design often containing a stimulus-response pair or stimulus-response-feedback triad. # Optional label for the trial (often a numerical string). takesValue valueClass nameClass Indicator-variable An aspect of the experiment or task that is measured as task conditions are varied during the experiment. Experiment indicators are sometimes called dependent variables. # Name of the indicator variable. takesValue valueClass nameClass Recording A tag designating the data recording. Recording tags are usually have temporal scope which is the entire recording. # Optional label for the recording. takesValue valueClass nameClass Task An assigned piece of work, usually with a time allotment. A tag used to indicate a linkage the structured activities performed as part of the experiment. # Optional label for the task block. takesValue valueClass nameClass Time-block A tag used to indicate a contiguous time block in the experiment during which something is fixed or noted. # Optional label for the task block. takesValue valueClass nameClass Sensory-property Relating to sensation or the physical senses. Sensory-attribute A sensory characteristic associated with another entity. Auditory-attribute Pertaining to the sense of hearing. Loudness Perceived intensity of a sound. # takesValue valueClass numericClass Pitch A perceptual property that allows the user to order sounds on a frequency scale. # takesValue unitClass frequencyUnits valueClass numericClass Sound-envelope Description of how a sound changes over time. Sound-envelope-attack The time taken for initial run-up of level from nil to peak usually beginning when the key on a musical instrument is pressed. # takesValue unitClass timeUnits valueClass numericClass Sound-envelope-decay The time taken for the subsequent run down from the attack level to the designated sustain level. # takesValue unitClass timeUnits valueClass numericClass Sound-envelope-release The time taken for the level to decay from the sustain level to zero after the key is released # takesValue unitClass timeUnits valueClass numericClass Sound-envelope-sustain The time taken for the main sequence of the sound duration, until the key is released. # takesValue unitClass timeUnits valueClass numericClass Timbre The perceived sound quality of a singing voice or musical instrument. # takesValue valueClass labelClass Gustatory-attribute Pertaining to the sense of taste. Bitter Having a sharp, pungent taste. Salty Tasting of or like salt. Savory Belonging to a taste that is salty or spicy rather than sweet. Sour Having a sharp, acidic taste. Sweet Having or resembling the taste of sugar. Olfactory-attribute Having a smell. Somatic-attribute Pertaining to the feelings in the body or of the nervous system. Pain The sensation of discomfort, distress, or agony, resulting from the stimulation of specialized nerve endings. Stress The negative mental, emotional, and physical reactions that occur when environmental stressors are perceived as exceeding the adaptive capacities of the individual. Tactile-attribute Pertaining to the sense of touch. Tactile-pressure Having a feeling of heaviness. Tactile-temperature Having a feeling of hotness or coldness. Tactile-texture Having a feeling of roughness. Tactile-vibration Having a feeling of mechanical oscillation. Vestibular-attribute Pertaining to the sense of balance or body position. Visual-attribute Pertaining to the sense of sight. Color The appearance of objects (or light sources) described in terms of perception of their hue and lightness (or brightness) and saturation. CSS-color One of 140 colors supported by all browsers. For more details such as the color RGB or HEX values, check: https://www.w3schools.com/colors/colors_groups.asp Blue-color CSS color group CadetBlue CSS-color 0x5F9EA0 SteelBlue CSS-color 0x4682B4 LightSteelBlue CSS-color 0xB0C4DE LightBlue CSS-color 0xADD8E6 PowderBlue CSS-color 0xB0E0E6 LightSkyBlue CSS-color 0x87CEFA SkyBlue CSS-color 0x87CEEB CornflowerBlue CSS-color 0x6495ED DeepSkyBlue CSS-color 0x00BFFF DodgerBlue CSS-color 0x1E90FF RoyalBlue CSS-color 0x4169E1 Blue CSS-color 0x0000FF MediumBlue CSS-color 0x0000CD DarkBlue CSS-color 0x00008B Navy CSS-color 0x000080 MidnightBlue CSS-color 0x191970 Brown-color CSS color group Cornsilk CSS-color 0xFFF8DC BlanchedAlmond CSS-color 0xFFEBCD Bisque CSS-color 0xFFE4C4 NavajoWhite CSS-color 0xFFDEAD Wheat CSS-color 0xF5DEB3 BurlyWood CSS-color 0xDEB887 Tan CSS-color 0xD2B48C RosyBrown CSS-color 0xBC8F8F SandyBrown CSS-color 0xF4A460 GoldenRod CSS-color 0xDAA520 DarkGoldenRod CSS-color 0xB8860B Peru CSS-color 0xCD853F Chocolate CSS-color 0xD2691E Olive CSS-color 0x808000 SaddleBrown CSS-color 0x8B4513 Sienna CSS-color 0xA0522D Brown CSS-color 0xA52A2A Maroon CSS-color 0x800000 Cyan-color CSS color group Aqua CSS-color 0x00FFFF Cyan CSS-color 0x00FFFF LightCyan CSS-color 0xE0FFFF PaleTurquoise CSS-color 0xAFEEEE Aquamarine CSS-color 0x7FFFD4 Turquoise CSS-color 0x40E0D0 MediumTurquoise CSS-color 0x48D1CC DarkTurquoise CSS-color 0x00CED1 Green-color CSS color group GreenYellow CSS-color 0xADFF2F Chartreuse CSS-color 0x7FFF00 LawnGreen CSS-color 0x7CFC00 Lime CSS-color 0x00FF00 LimeGreen CSS-color 0x32CD32 PaleGreen CSS-color 0x98FB98 LightGreen CSS-color 0x90EE90 MediumSpringGreen CSS-color 0x00FA9A SpringGreen CSS-color 0x00FF7F MediumSeaGreen CSS-color 0x3CB371 SeaGreen CSS-color 0x2E8B57 ForestGreen CSS-color 0x228B22 Green CSS-color 0x008000 DarkGreen CSS-color 0x006400 YellowGreen CSS-color 0x9ACD32 OliveDrab CSS-color 0x6B8E23 DarkOliveGreen CSS-color 0x556B2F MediumAquaMarine CSS-color 0x66CDAA DarkSeaGreen CSS-color 0x8FBC8F LightSeaGreen CSS-color 0x20B2AA DarkCyan CSS-color 0x008B8B Teal CSS-color 0x008080 Gray-color CSS color group Gainsboro CSS-color 0xDCDCDC LightGray CSS-color 0xD3D3D3 Silver CSS-color 0xC0C0C0 DarkGray CSS-color 0xA9A9A9 DimGray CSS-color 0x696969 Gray CSS-color 0x808080 LightSlateGray CSS-color 0x778899 SlateGray CSS-color 0x708090 DarkSlateGray CSS-color 0x2F4F4F Black CSS-color 0x000000 Orange-color CSS color group Orange CSS-color 0xFFA500 DarkOrange CSS-color 0xFF8C00 Coral CSS-color 0xFF7F50 Tomato CSS-color 0xFF6347 OrangeRed CSS-color 0xFF4500 Pink-color CSS color group Pink CSS-color 0xFFC0CB LightPink CSS-color 0xFFB6C1 HotPink CSS-color 0xFF69B4 DeepPink CSS-color 0xFF1493 PaleVioletRed CSS-color 0xDB7093 MediumVioletRed CSS-color 0xC71585 Purple-color CSS color group Lavender CSS-color 0xE6E6FA Thistle CSS-color 0xD8BFD8 Plum CSS-color 0xDDA0DD Orchid CSS-color 0xDA70D6 Violet CSS-color 0xEE82EE Fuchsia CSS-color 0xFF00FF Magenta CSS-color 0xFF00FF MediumOrchid CSS-color 0xBA55D3 DarkOrchid CSS-color 0x9932CC DarkViolet CSS-color 0x9400D3 BlueViolet CSS-color 0x8A2BE2 DarkMagenta CSS-color 0x8B008B Purple CSS-color 0x800080 MediumPurple CSS-color 0x9370DB MediumSlateBlue CSS-color 0x7B68EE SlateBlue CSS-color 0x6A5ACD DarkSlateBlue CSS-color 0x483D8B RebeccaPurple CSS-color 0x663399 Indigo CSS-color 0x4B0082 Red-color CSS color group LightSalmon CSS-color 0xFFA07A Salmon CSS-color 0xFA8072 DarkSalmon CSS-color 0xE9967A LightCoral CSS-color 0xF08080 IndianRed CSS-color 0xCD5C5C Crimson CSS-color 0xDC143C Red CSS-color 0xFF0000 FireBrick CSS-color 0xB22222 DarkRed CSS-color 0x8B0000 Yellow-color CSS color group Gold CSS-color 0xFFD700 Yellow CSS-color 0xFFFF00 LightYellow CSS-color 0xFFFFE0 LemonChiffon CSS-color 0xFFFACD LightGoldenRodYellow CSS-color 0xFAFAD2 PapayaWhip CSS-color 0xFFEFD5 Moccasin CSS-color 0xFFE4B5 PeachPuff CSS-color 0xFFDAB9 PaleGoldenRod CSS-color 0xEEE8AA Khaki CSS-color 0xF0E68C DarkKhaki CSS-color 0xBDB76B White-color CSS color group White CSS-color 0xFFFFFF Snow CSS-color 0xFFFAFA HoneyDew CSS-color 0xF0FFF0 MintCream CSS-color 0xF5FFFA Azure CSS-color 0xF0FFFF AliceBlue CSS-color 0xF0F8FF GhostWhite CSS-color 0xF8F8FF WhiteSmoke CSS-color 0xF5F5F5 SeaShell CSS-color 0xFFF5EE Beige CSS-color 0xF5F5DC OldLace CSS-color 0xFDF5E6 FloralWhite CSS-color 0xFFFAF0 Ivory CSS-color 0xFFFFF0 AntiqueWhite CSS-color 0xFAEBD7 Linen CSS-color 0xFAF0E6 LavenderBlush CSS-color 0xFFF0F5 MistyRose CSS-color 0xFFE4E1 Color-shade A slight degree of difference between colors, especially with regard to how light or dark it is or as distinguished from one nearly like it. Dark-shade A color tone not reflecting much light. Light-shade A color tone reflecting more light. Grayscale Using a color map composed of shades of gray, varying from black at the weakest intensity to white at the strongest. # White intensity between 0 and 1 takesValue valueClass numericClass HSV-color A color representation that models how colors appear under light. Hue Attribute of a visual sensation according to which an area appears to be similar to one of the perceived colors. # Angular value between 0 and 360 takesValue valueClass numericClass Saturation Colorfulness of a stimulus relative to its own brightness. # B value of RGB between 0 and 1 takesValue valueClass numericClass HSV-value AAttribute of a visual sensation according to which an area appears to emit more or less light. # takesValue valueClass numericClass RGB-color A color from the RGB schema. RGB-red The red component. # R value of RGB between 0 and 1 takesValue valueClass numericClass RGB-blue The blue component. # B value of RGB between 0 and 1 takesValue valueClass numericClass RGB-green The green component. # G value of RGB between 0 and 1 takesValue valueClass numericClass Luminance A quality that exists by virtue of the luminous intensity per unit area projected in a given direction. Opacity A measure of impenetrability to light. Sensory-presentation The entity has a sensory manifestation. Auditory-presentation The sense of hearing is used in the presentation to the user. Loudspeaker-separation The distance between two loudspeakers. Grouped with the Distance tag. suggestedTag Distance Monophonic Relating to sound transmission, recording, or reproduction involving a single transmission path. Silent The absence of ambient audible sound or the state of having ceased to produce sounds. Stereophonic Relating to, or constituting sound reproduction involving the use of separated microphones and two transmission channels to achieve the sound separation of a live hearing. Gustatory-presentation The sense of taste used in the presentation to the user. Olfactory-presentation The sense of smell used in the presentation to the user. Somatic-presentation The nervous system is used in the presentation to the user. Tactile-presentation The sense of touch used in the presentation to the user. Vestibular-presentation The sense balance used in the presentation to the user. Visual-presentation The sense of sight used in the presentation to the user. 2D-view A view showing only two dimensions. 3D-view A view showing three dimensions. Background-view Parts of the view that are farthest from the viewer and usually the not part of the visual focus. Bistable-view Something having two stable visual forms that have two distinguishable stable forms as in optical illusions. Foreground-view Parts of the view that are closest to the viewer and usually the most important part of the visual focus. Foveal-view Visual presentation directly on the fovea. A view projected on the small depression in the retina containing only cones and where vision is most acute. Map-view A diagrammatic representation of an area of land or sea showing physical features, cities, roads. Aerial-view Elevated view of an object from above, with a perspective as though the observer were a bird. Satellite-view A representation as captured by technology such as a satellite. Street-view A 360-degrees panoramic view from a position on the ground. Peripheral-view Indirect vision as it occurs outside the point of fixation. Task-property Something that pertains to a task. extensionAllowed Task-attentional-demand Strategy for allocating attention toward goal-relevant information. Bottom-up-attention Attentional guidance purely by externally driven factors to stimuli that are salient because of their inherent properties relative to the background. Sometimes this is referred to as stimulus driven. relatedTag Top-down-attention Covert-attention Paying attention without moving the eyes. relatedTag Overt-attention Divided-attention Integrating parallel multiple stimuli. Behavior involving responding simultaneously to multiple tasks or multiple task demands. relatedTag Focused-attention Focused-attention Responding discretely to specific visual, auditory, or tactile stimuli. relatedTag Divided-attention Orienting-attention Directing attention to a target stimulus. Overt-attention Selectively processing one location over others by moving the eyes to point at that location. relatedTag Covert-attention Selective-attention Maintaining a behavioral or cognitive set in the face of distracting or competing stimuli. Ability to pay attention to a limited array of all available sensory information. Sustained-attention Maintaining a consistent behavioral response during continuous and repetitive activity. Switched-attention Having to switch attention between two or more modalities of presentation. Top-down-attention Voluntary allocation of attention to certain features. Sometimes this is referred to goal-oriented attention. relatedTag Bottom-up-attention Task-effect-evidence The evidence supporting the conclusion that the event had the specified effect. Computational-evidence A type of evidence in which data are produced, and/or generated, and/or analyzed on a computer. External-evidence A phenomenon that follows and is caused by some previous phenomenon. Intended-effect A phenomenon that is intended to follow and be caused by some previous phenomenon. Behavioral-evidence An indication or conclusion based on the behavior of an agent. Task-event-role The purpose of an event with respect to the task. Experimental-stimulus Part of something designed to elicit a response in the experiment. Incidental Usually associated with a sensory event intended to give instructions to the participant about the task or behavior. Instructional Usually associated with a sensory event intended to give instructions to the participant about the task or behavior. Mishap Unplanned disruption such as an equipment or experiment control abnormality or experimenter error. Participant-response Something related to a participant actions in performing the task. Task-activity Something that is part of the overall task or is necessary to the overall experiment but is not directly part of a stimulus-response cycle. Examples would be taking a survey or provided providing a silva sample. Warning Something that should warn the participant that the parameters of the task have been or are about to be exceeded such as a warning message about getting too close to the shoulder of the road in a driving task. Task-action-type How an agent action should be interpreted in terms of the task specification. Appropriate-action An action suitable or proper in the circumstances. relatedTag Inappropriate-action Correct-action An action that was a correct response in the context of the task. relatedTag Incorrect-action Indeterminate-action Correction An action offering an improvement to replace a mistake or error. Incorrect-action An action considered wrong or incorrect in the context of the task. relatedTag Correct-action Indeterminate-action Imagined-action Form a mental image or concept of something. This is used to identity something that only happened in the imagination of the participant as in imagined movements in motor imagery paradigms. Inappropriate-action An action not in keeping with what is correct or proper for the task. relatedTag Appropriate-action Indeterminate-action An action that cannot be distinguished between two or more possibibities in the current context. This tag might be applied when an outside evaluator or a classification algorithm cannot determine a definitive result. relatedTag Correct-action Incorrect-action Miss Near-miss Omitted-action An expected response was skipped. Miss An action considered to be a failure in the context of the task. For example, if the agent is supposed to try to hit a target and misses. relatedTag Near-miss Near-miss An action barely satisfied the requirements of the task. In a driving experiment for example this could pertain to a narrowly avoided collision or other accident. relatedTag Miss Task-relationship Specifying organizational importance of sub-tasks. Background-subtask A part of the task which should be performed in the background as for example inhibiting blinks due to instruction while performing the primary task. Primary-subtask A part of the task which should be the primary focus of the participant. Task-stimulus-role The role the stimulus plays in the task. Cue A signal for an action, a pattern of stimuli indicating a particular response. Distractor A person or thing that distracts or a plausible but incorrect option in a multiple-choice question. In pyschological studies this is sometimes referred to as a foil. Expected Considered likely, probable or anticipated. Something of low information value as in frequent non-targets in an RSVP paradigm. relatedTag Unexpected suggestedTag Target Extraneous Irrelevant or unrelated to the subject being dealt with. Feedback An evaluative response to an inquiry, process, event, or activity. Go-signal An indicator to proceed with a planned action. relatedTag Stop-signal Meaningful Conveying significant or relevant information. Newly-learned Representing recently acquired information or understanding. Non-informative Something that is not useful in forming an opinion or judging an outcome. Non-target Something other than that done or looked for. Also tag Expected if the Non-target is frequent. relatedTag Target Not-meaningful Not having a serious, important, or useful quality or purpose. Novel Having no previous example or precedent or parallel. Oddball Something unusual, or infrequent. relatedTag Unexpected suggestedTag Target Planned Something that was decided on or arranged in advance. relatedTag Unplanned Penalty A disadvantage, loss, or hardship due to some action. Priming An implicit memory effect in which exposure to a stimulus influences response to a later stimulus. Query A sentence of inquiry that asks for a reply. Reward A positive reinforcement for a desired action, behavior or response. Stop-signal An indicator that the agent should stop the current activity. relatedTag Go-signal Target Something fixed as a goal, destination, or point of examination. Threat An indicator that signifies hostility and predicts an increased probability of attack. Timed Something planned or scheduled to be done at a particular time or lasting for a specified amount of time. Unexpected Something that is not anticipated. relatedTag Expected Unplanned Something that has not been planned as part of the task. relatedTag Planned Relation Concerns the way in which two or more people or things are connected. Comparative-relation Something considered in comparison to something else. Approximately-equal-to (A (Approximately-equal-to B)) indicates that A and B have almost the same value. Here A and B could refer to sizes, orders, positions or other quantities. Less-than (A (Less-than B)) indicates that A is smaller than B. Here A and B could refer to sizes, orders, positions or other quantities. Less-than-or-equal-to (A (Less-than-or-equal-to B)) indicates that the relative size or order of A is smaller than or equal to B. Greater-than (A (Greater-than B)) indicates that the relative size or order of A is bigger than that of B. Greater-than-or-equal-to (A (Greater-than-or-equal-to B)) indicates that the relative size or order of A is bigger than or the same as that of B. Equal-to (A (Equal-to B)) indicates that the size or order of A is the same as that of B. Not-equal-to (A (Not-equal-to B)) indicates that the size or order of A is not the same as that of B. Connective-relation Indicates two items are related in some way. Belongs-to (A (Belongs-to B)) indicates that A is a member of B. Connected-to (A (Connected-to) B) indicates that A is related to B in some respect, usually through a direct link. Contained-in (A (Contained-in B)) indicates that A is completely inside of B. Described-by (A (Described-by B)) indicates that B provides information about A. From-to (A (From-to B)) indicates a directional relation from A to B. A is considered the source. Group-of (A (Group-of B)) indicates A is a group of items of type B. Implied-by (A (Implied-by B)) indicates B is suggested by A. Interacts-with (A (Interacts-with B)) indicates A and B interact, possibly reciprocally. Member-of (A (Member-of B)) indicates A is a member of group B. Part-of (A (Part-of B)) indicates A is a part of the whole B. Performed-by (A (Performed-by B)) Indicates that ction or procedure A was carried out by agent B. Related-to (A (Relative-to B)) indicates A is a part of the whole B. Directional-relation A relationship indicating direction of change. Away-from Go away from a place or object. Towards Moving in the direction of. A relation binding a relational quality or disposition to the relevant type of entity Spatial-relation Indicating information about position. Above (A (Adjacent-to B)) means A is in a place or position that is higher than B. Across-from (A (Across-from B)) means A is on the opposite side of something from B. Adjacent-to (A (Adjacent-to B)) indicates that A is next to B in time or space. Ahead-of (A (Ahead-of B)) indicates that A is further forward in time or space in B. Around (A (Around B)) means A is in or near the present place or situation of B. Behind (A (Behind B)) means A is at or to the far side of B, typically so as to be hidden by it. Below (A (Below B)) means A is in a place or position that is lower than the position of B. Between (A (Between, (B, C))) means A is in the space or interval separating B and C. Bilateral-to (A (Bilateral B)) means A is on both sides of B or affects both sides of B. Bottom-edge-of (A (Bottom-edge-of B)) means A is on the bottom most part or or near the boundary of B. relatedTag Left-edge-of Right-edge-of Top-edge-of Boundary-of (A (Boundary-of B)) means A is on or part of the edge or boundary of B. Center-of (A (Center-of B)) means A is at a point or or in an area that is approximately central within B. Close-to (A (Close-to B)) means A is at a small distance from or is located near in space to B. Far-from (A (Far-from B)) means A is at a large distance from or is not located near in space to B. In-front-of (A (In-front-of B)) means A is in a position just ahead or at the front part of B, potentially partially blocking B from view. Left-edge-of (A (Left-edge-of B)) means A is located on the left side of B on or near the boundary of B. relatedTag Bottom-edge-of Right-edge-of Top-edge-of Left-side-of (A (Left-side-of B)) means A is located on the left side of B usually as part of B. relatedTag Right-side-of Lower-left-of (A (Lower-left-of B)) means A is situated on the lower left part of B. This relation is often used to specify qualitative information about screen position. relatedTag Lower-right-of Lower-right-of (A (Lower-right-of B)) means A is situated on the lower right part of B. This relation is often used to specify qualitative information about screen position. relatedTag Upper-left-of Outside-of (A (Outside-of B)) means A is located in the space around but not including B. Over (A (over B)) means A above is above B so as to cover or protect or A extends over the a general area as from a from a vantage point. Right-edge-of (A (Right-edge-of B)) means A is located on the right side of B on or near the boundary of B. relatedTag Bottom-edge-of Left-edge-of Top-edge-of Right-side-of (A (Right-side-of B)) means A is located on the right side of B usually as part of B. relatedTag Left-side-of To-left-of (A (To-left-of B)) means A is located on or directed toward the side to the west of B when B is facing north. This term is used when A is not part of B. To-right-of (A (To-right-of B)) means A is located on or directed toward the side to the east of B when B is facing north. This term is used when A is not part of B. Top-edge-of (A (Top-edge-of B)) means A is on the uppermost part or or near the boundary of B. relatedTag Left-edge-of Right-edge-of Bottom-edge-of Top-of (A (Top-of B)) means A is on the uppermost part, side, or surface of B. Underneath (A (Underneath B)) means A is situated directly below and may be concealed by B. Upper-left-of (A (Upper-left-of B)) means A is situated on the upper left part of B. This relation is often used to specify qualitative information about screen position. relatedTag Lower-left-of Upper-right-of (A (Upper-right-of B)) means A is situated on the upper right part of B. This relation is often used to specify qualitative information about screen position. relatedTag Lower-left-of Within (A (Within B)) means A is on the inside of or contained in B. Temporal-relation Any relationship which includes a temporal or time-based component. After (A After B) means A happens at a time subsequent to a reference time related to B. Asynchronous-with (A Asynchronous-with B) means A happens at times not occurring at the same time or having the same period or phase as B. Before (A Before B) means A happens at a time earlier in time or order than B. During (A During B) means A happens at some point in a given period of time in which B is ongoing. Synchronous-with (A Synchronous-with B) means A happens at occurs at the same time or rate as B. Waiting-for (A Waiting-for B) means A pauses for something to happen in B. accelerationUnits defaultUnits m-per-s^2 m-per-s^2 SIUnit unitSymbol angleUnits defaultUnits radian radian SIUnit rad SIUnit unitSymbol degree areaUnits defaultUnits m^2 m^2 SIUnit unitSymbol currencyUnits Units indicating the worth of something. defaultUnits $ dollar $ unitPrefix unitSymbol point frequencyUnits defaultUnits Hz hertz SIUnit Hz SIUnit unitSymbol intensityUnits defaultUnits dB dB Intensity expressed as ratio to a threshold. Often used for sound intensity. unitSymbol candela Units used to express light intensity. SIUnit cd Units used to express light intensity. SIUnit unitSymbol jerkUnits defaultUnits m-per-s^3 m-per-s^3 unitSymbol memorySizeUnits defaultUnits B byte SIUnit B SIUnit unitSymbol physicalLengthUnits defaultUnits m foot inch metre SIUnit m SIUnit unitSymbol mile speedUnits defaultUnits m-per-s m-per-s SIUnit unitSymbol mph unitSymbol kph unitSymbol timeUnits defaultUnits s second SIUnit s SIUnit unitSymbol day minute hour Should be in 24-hour format. volumeUnits defaultUnits m^3 m^3 SIUnit unitSymbol weightUnits defaultUnits g g SIUnit unitSymbol gram SIUnit pound lb deca SI unit multiple representing 10^1 SIUnitModifier da SI unit multiple representing 10^1 SIUnitSymbolModifier hecto SI unit multiple representing 10^2 SIUnitModifier h SI unit multiple representing 10^2 SIUnitSymbolModifier kilo SI unit multiple representing 10^3 SIUnitModifier k SI unit multiple representing 10^3 SIUnitSymbolModifier mega SI unit multiple representing 10^6 SIUnitModifier M SI unit multiple representing 10^6 SIUnitSymbolModifier giga SI unit multiple representing 10^9 SIUnitModifier G SI unit multiple representing 10^9 SIUnitSymbolModifier tera SI unit multiple representing 10^12 SIUnitModifier T SI unit multiple representing 10^12 SIUnitSymbolModifier peta SI unit multiple representing 10^15 SIUnitModifier P SI unit multiple representing 10^15 SIUnitSymbolModifier exa SI unit multiple representing 10^18 SIUnitModifier E SI unit multiple representing 10^18 SIUnitSymbolModifier zetta SI unit multiple representing 10^21 SIUnitModifier Z SI unit multiple representing 10^21 SIUnitSymbolModifier yotta SI unit multiple representing 10^24 SIUnitModifier Y SI unit multiple representing 10^24 SIUnitSymbolModifier deci SI unit submultiple representing 10^-1 SIUnitModifier d SI unit submultiple representing 10^-1 SIUnitSymbolModifier centi SI unit submultiple representing 10^-2 SIUnitModifier c SI unit submultiple representing 10^-2 SIUnitSymbolModifier milli SI unit submultiple representing 10^-3 SIUnitModifier m SI unit submultiple representing 10^-3 SIUnitSymbolModifier micro SI unit submultiple representing 10^-6 SIUnitModifier u SI unit submultiple representing 10^-6 SIUnitSymbolModifier nano SI unit submultiple representing 10^-9 SIUnitModifier n SI unit submultiple representing 10^-9 SIUnitSymbolModifier pico SI unit submultiple representing 10^-12 SIUnitModifier p SI unit submultiple representing 10^-12 SIUnitSymbolModifier femto SI unit submultiple representing 10^-15 SIUnitModifier f SI unit submultiple representing 10^-15 SIUnitSymbolModifier atto SI unit submultiple representing 10^-18 SIUnitModifier a SI unit submultiple representing 10^-18 SIUnitSymbolModifier zepto SI unit submultiple representing 10^-21 SIUnitModifier z SI unit submultiple representing 10^-21 SIUnitSymbolModifier yocto SI unit submultiple representing 10^-24 SIUnitModifier y SI unit submultiple representing 10^-24 SIUnitSymbolModifier dateTimeClass Date-times should conform to ISO8601 date-time format YYYY-MM-DDThh:mm:ss. Any variation on the full form is allowed. allowedCharacter digits T - : nameClass Value class designating values that have the characteristics of node names. The allowed characters are alphanumeric, hyphen, and underbar. allowedCharacter letters digits _ - numericClass Value must be a valid numerical value. allowedCharacter digits E e + - . posixPath Posix path specification. allowedCharacter digits letters / : textClass Value class designating values that have the characteristics of text such as in descriptions. allowedCharacter letters digits blank + - : ; . / ( ) ? * % $ @ allowedCharacter A schema attribute of value classes specifying a special character that is allowed in expressing the value of a placeholder. Normally the allowed characters are listed individually. However, the word letters designates the upper and lower case alphabetic characters and the word digits designates the digits 0-9. The word blank designates the blank character. valueClassProperty defaultUnits A schema attribute of unit classes specifying the default units to use if the placeholder has a unit class but the substituted value has no units. unitClassProperty extensionAllowed A schema attribute indicating that users can add unlimited levels of child nodes under this tag. This tag is propagated to child nodes with the exception of the hashtag placeholders. boolProperty recommended A schema attribute indicating that the event-level HED string should include this tag. boolProperty relatedTag A schema attribute suggesting HED tags that are closely related to this tag. This attribute is used by tagging tools. requireChild A schema attribute indicating that one of the node elements descendants must be included when using this tag. boolProperty required A schema attribute indicating that every event-level HED string should include this tag. boolProperty SIUnit A schema attribute indicating that this unit element is an SI unit and can be modified by multiple and submultiple names. Note that some units such as byte are designated as SI units although they are not part of the standard. boolProperty unitProperty SIUnitModifier A schema attribute indicating that this SI unit modifier represents a multiple or submultiple of a base unit rather than a unit symbol. boolProperty unitModifierProperty SIUnitSymbolModifier A schema attribute indicating that this SI unit modifier represents a multiple or submultiple of a unit symbol rather than a base symbol. boolProperty unitModifierProperty suggestedTag A schema attribute that indicates another tag that is often associated with this tag. This attribute is used by tagging tools to provide tagging suggestions. tagGroup A schema attribute indicating the tag can only appear inside a tag group. boolProperty takesValue A schema attribute indicating the tag is a hashtag placeholder that is expected to be replaced with a user-defined value. boolProperty topLevelTagGroup A schema attribute indicating that this tag (or its descendants) can only appear in a top-level tag group. boolProperty unique A schema attribute indicating that only one of this tag or its descendants can be used in the event-level HED string. boolProperty unitClass A schema attribute specifying which unit class this value tag belongs to. unitPrefix A schema attribute applied specifically to unit elements to designate that the unit indicator is a prefix (e.g., dollar sign in the currency units). boolProperty unitProperty unitSymbol A schema attribute indicating this tag is an abbreviation or symbol representing a type of unit. Unit symbols represent both the singular and the plural and thus cannot be pluralized. boolProperty unitProperty valueClass A schema attribute specifying which value class this value tag belongs to. boolProperty Indicates that the schema attribute represents something that is either true or false and does not have a value. Attributes without this value are assumed to have string values. unitClassProperty Indicates that the schema attribute is meant to be applied to unit classes. unitModifierProperty Indicates that the schema attribute is meant to be applied to unit modifier classes. unitProperty Indicates that the schema attribute is meant to be applied to units within a unit class. valueClassProperty Indicates that the schema attribute is meant to be applied to value classes. This is an updated version of the schema format. The properties are now part of the schema. The schema attributes are designed to be checked in software rather than hard-coded. The schema attributes, themselves have properties.