# baseURI: https://w3id.org/isample/opencontext/material/oc_materialsvocab
# imports: http://www.w3.org/2004/02/skos/core

@prefix mat: <https://w3id.org/isample/vocabulary/material/> .
@prefix ocmat: <https://w3id.org/isample/opencontext/material/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema: <http://schema.org/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<AWDID:2004562>
  rdf:type schema:Grant ;
  schema:funder <https://ror.org/04nh1dc89> ;
  schema:name "Collaborative Research: Frameworks: Internet of Samples: Toward an Interdisciplinary Cyberinfrastructure for Material Samples" ;
  schema:url "https://nsf.gov/awardsearch/showAward?AWD_ID=2004562" ;
.
ocmat:amber
  rdf:type skos:Concept ;
  rdfs:label "amber"@en ;
  skos:broader mat:biogenicnonorganicmaterial ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "amber"@en ;
.
ocmat:anthropogenicorganicmaterial
  rdf:type skos:Concept ;
  rdfs:label "anthropogenic organic material"@en ;
  skos:broader mat:otheranthropogenicmaterial ;
  skos:definition "Organic material manufactured by humans"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "anthropogenic organic material"@en ;
.
ocmat:basalt
  rdf:type skos:Concept ;
  rdfs:label "basalt"@en ;
  skos:broader mat:rock ;
  skos:closeMatch <http://resource.geosciml.org/classifier/cgi/lithology/basalt> ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "basalt"@en ;
.
ocmat:bone
  rdf:type skos:Concept ;
  rdfs:label "bone"@en ;
  skos:broader mat:biogenicnonorganicmaterial ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "bone"@en ;
.
ocmat:brass
  rdf:type skos:Concept ;
  rdfs:label "brass"@en ;
  skos:broader mat:anthropogenicmetal ;
  skos:definition "alloy of copper (Cu) and zinc (Zn)"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "brass"@en ;
.
ocmat:brickclay
  rdf:type skos:Concept ;
  rdfs:label "brick clay"@en ;
  skos:broader ocmat:ceramicclay ;
  skos:definition "dried or low-fired clay-rich material used to make blocks for construction"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "brick clay"@en ;
.
ocmat:bronze
  rdf:type skos:Concept ;
  rdfs:label "bronze"@en ;
  skos:broader mat:anthropogenicmetal ;
  skos:definition "alloy consisting primarily of copper with subordinate tin;  often includes other metals"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "bronze"@en ;
.
ocmat:bucchero
  rdf:type skos:Concept ;
  rdfs:label "bucchero"@en ;
  skos:broader ocmat:ceramicclay ;
  skos:definition "ceramic with black fabric and glossy, black surface achieved through reduction firing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "bucchero"@en ;
.
ocmat:ceramicclay
  rdf:type skos:Concept ;
  rdfs:label "ceramic clay"@en ;
  skos:broader mat:otheranthropogenicmaterial ;
  skos:definition "Any of the various hard, brittle, heat-resistant and corrosion-resistant materials made by shaping and then firing an inorganic, nonmetallic material, such as clay, at a high temperature.  Common examples are earthenware, porcelain, and brick. (https://en.wikipedia.org/wiki/Ceramic)"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "ceramic clay"@en ;
.
ocmat:charcoal
  rdf:type skos:Concept ;
  rdfs:label "charcoal"@en ;
  skos:broader mat:biogenicnonorganicmaterial ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "charcoal"@en ;
.
ocmat:chert
  rdf:type skos:Concept ;
  rdfs:label "chert"@en ;
  skos:broader mat:rock ;
  skos:closeMatch <https://www.mindat.org/1:1:994:6> ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "chert"@en ;
.
ocmat:cinder
  rdf:type skos:Concept ;
  rdfs:label "cinder"@en ;
  skos:broader mat:particulate ;
  skos:broader mat:rock ;
  skos:definition "The incombustible residue of something burnt. (http://vocab.getty.edu/page/aat/300011788)"@en ;
  skos:definition "missing"@en ;
  skos:exactMatch <https://vocab.getty.edu/aat/300011788> ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "cinder"@en ;
.
ocmat:coal
  rdf:type skos:Concept ;
  rdfs:label "coal"@en ;
  skos:broader mat:biogenicnonorganicmaterial ;
  skos:broader mat:rock ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "coal"@en ;
.
ocmat:copper
  rdf:type skos:Concept ;
  rdfs:label "copper"@en ;
  skos:broader mat:anthropogenicmetal ;
  skos:definition "copper metal, includes copper-rich alloys not identifiable as brass or bronze."@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "copper"@en ;
.
ocmat:dolomite
  rdf:type skos:Concept ;
  rdfs:label "dolomite"@en ;
  skos:altLabel "dolostone"@en ;
  skos:broader mat:rock ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "dolomite"@en ;
.
ocmat:faience
  rdf:type skos:Concept ;
  rdfs:label "faience"@en ;
  skos:broader ocmat:ceramicclay ;
  skos:definition "fine white-glazed ceramic (tin oxide based glaze)"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "faience"@en ;
.
ocmat:fibermaterial
  rdf:type skos:Concept ;
  rdfs:label "fiber material"@en ;
  skos:broader mat:otheranthropogenicmaterial ;
  skos:definition "material composed of fibers twisted or woved togther. Fibers might be plant material or Anthropogenic Organic material."@en ;
  skos:example "cloth, thread, rope, string are composed of fiber material."@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:note "samples composed of fiber material might also be asserted to be composed of 'Plant fiber' or Anthropogenic organic material' if the nature of the fiber is known."@en ;
  skos:prefLabel "fiber material"@en ;
.
ocmat:flint
  rdf:type skos:Concept ;
  rdfs:label "flint"@en ;
  skos:broader ocmat:chert ;
  skos:closeMatch <https://www.mindat.org/1:1:6676:7> ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "flint"@en ;
.
ocmat:gabbro
  rdf:type skos:Concept ;
  rdfs:label "gabbro"@en ;
  skos:broader mat:rock ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "gabbro"@en ;
.
ocmat:glass
  rdf:type skos:Concept ;
  rdfs:label "glass"@en ;
  skos:broader mat:otheranthropogenicmaterial ;
  skos:definition "A non-crystalline, often transparent amorphous solid, most often formed by rapid cooling (quenching) of the molten silca rich material. (https://en.wikipedia.org/wiki/Glass)"@en ;
  skos:exactMatch <http://vocab.getty.edu/page/aat/300010797> ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "glass"@en ;
.
ocmat:gold
  rdf:type skos:Concept ;
  rdfs:label "gold"@en ;
  skos:broader mat:anthropogenicmetal ;
  skos:definition "a chemical element with atomic number 79; a dense, soft metal that is easily malleable and ductile. It has a melting point of 1064 degrees Celsius and a boiling point of 2,807 degrees Celsius. (ChatGPT)"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "gold"@en ;
.
ocmat:greywacke
  rdf:type skos:Concept ;
  rdfs:label "greywacke"@en ;
  skos:altLabel "graywacke"@en ;
  skos:broader mat:rock ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "greywacke"@en ;
.
ocmat:hair
  rdf:type skos:Concept ;
  rdfs:label "hair"@en ;
  skos:broader ocmat:organicanimalmaterial ;
  skos:definition "Material comprising the cylindrical filaments that grow from follicles embedded in the skin of mammals. Hair is a column of overlapping, fused cells that are composed of the protein keratin; hair is composed of three parts: the innermost column is the medula, the surrounding live cells (the cortex) contain pigment, and the outermost dead transparent cells are the cuticular scales. The portion of the hair outside of the skin is called the shaft. Fine, closely spaced hair that covers most of an animal's body is called fur. Dense, soft, curled hair is called wool. Coarse, stiff hairs are called bristles, spines, or quills. Horsehair and cattle hair have been used for brushes, plaster binders, haircloth, and upholstery stuffing. Rabbit hair, often called rabbit fur, has been used to make felt hats. (http://vocab.getty.edu/page/aat/300011814)"@en ;
  skos:exactMatch <http://vocab.getty.edu/page/aat/300011814> ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "hair"@en ;
.
ocmat:hematite
  rdf:type skos:Concept ;
  rdfs:label "hematite"@en ;
  skos:broader mat:mineral ;
  skos:definition "missing"@en ;
  skos:exactMatch <https://www.mindat.org/1:1:1856:8> ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "hematite"@en ;
.
ocmat:iron
  rdf:type skos:Concept ;
  rdfs:label "iron"@en ;
  skos:broader mat:anthropogenicmetal ;
  skos:definition "Iron or iron-rich alloy"@en ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "iron"@en ;
.
ocmat:kaolin
  rdf:type skos:Concept ;
  rdfs:label "kaolin"@en ;
  skos:broader mat:mineral ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "kaolin"@en ;
.
ocmat:lead
  rdf:type skos:Concept ;
  rdfs:label "lead"@en ;
  skos:broader mat:anthropogenicmetal ;
  skos:definition "lead or lead-rich alloy"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "lead"@en ;
.
ocmat:leather
  rdf:type skos:Concept ;
  rdfs:label "leather"@en ;
  skos:broader ocmat:organicanimalmaterial ;
  skos:definition "The skin or hide of an animal that has been tanned to render it resistant to putrefication and relatively soft and flexible when dry. (http://vocab.getty.edu/page/aat/300011845)"@en ;
  skos:exactMatch <http://vocab.getty.edu/page/aat/300011845> ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "leather"@en ;
.
ocmat:limestone
  rdf:type skos:Concept ;
  rdfs:label "limestone"@en ;
  skos:broader mat:rock ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "limestone"@en ;
.
ocmat:marble
  rdf:type skos:Concept ;
  rdfs:label "marble"@en ;
  skos:broader mat:rock ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "marble"@en ;
.
ocmat:mica
  rdf:type skos:Concept ;
  rdfs:label "mica"@en ;
  skos:broader mat:mineral ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "mica"@en ;
.
ocmat:obsidian
  rdf:type skos:Concept ;
  rdfs:label "obsidian"@en ;
  skos:broader mat:rock ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "obsidian"@en ;
.
ocmat:oc_materialsvocab
  rdf:type owl:Ontology ;
  rdf:type skos:ConceptScheme ;
  <http://purl.org/dc/terms/modified> "2024-09-13"^^xsd:date ;
  schema:codeRepository <https://github.com/isamplesorg/metadata_profile_archaeology/tree/main/vocabulary> ;
  schema:funding <AWDID:2004562> ;
  schema:provider <http://cor.esipfed.org/ont#/> ;
  owl:imports <http://www.w3.org/2004/02/skos/core> ;
  owl:versionInfo "Created with TopBraid Composer"@en ;
  skos:definition "vocabulary of materials typical of archeological samples"@en ;
  skos:historyNote "2024-09-13 SMR remove version number from URI"@en ;
  skos:inScheme mat:materialsvocabulary ;
  skos:prefLabel "OpenContext material type extension draft"@en ;
.
ocmat:organicanimalmaterial
  rdf:type skos:Concept ;
  rdfs:label "organic animal material"@en ;
  skos:broader mat:organicmaterial ;
  skos:definition "Material that is (or was) a constituent of an animal organisms,  composed primarily of one or more very large molecules of biological origin."@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "organic animal material"@en ;
.
ocmat:organicplantmaterial
  rdf:type skos:Concept ;
  rdfs:label "organic plant material"@en ;
  skos:broader mat:organicmaterial ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "organic plant material"@en ;
.
ocmat:paper
  rdf:type skos:Concept ;
  rdfs:label "paper"@en ;
  skos:broader mat:otheranthropogenicmaterial ;
  skos:definition "thin matted or felted sheets or webs of fiber formed and dried on a fine screen from a pulpy water suspension. The fibers may be animal, such as hair, silk or wool, or mineral, such as asbestos, or synthetic. However most paper is made from cellulosic plant fiber, such as from wood pulp, grass, cotton, linen, and straw. (http://vocab.getty.edu/page/aat/300014109)"@en ;
  skos:exactMatch <http://vocab.getty.edu/page/aat/300014109> ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "paper"@en ;
.
ocmat:pewter
  rdf:type skos:Concept ;
  rdfs:label "pewter"@en ;
  skos:broader mat:anthropogenicmetal ;
  skos:definition "alloy consisting of mostly tin,  with antimony,  minor copper or bismuth, and sometimes silver."@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "pewter"@en ;
.
ocmat:plantfiber
  rdf:type skos:Concept ;
  rdfs:label "plant fiber"@en ;
  skos:broader ocmat:organicplantmaterial ;
  skos:definition "missing"@en ;
  skos:example "cotton, linen, yucca fiber"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "plant fiber"@en ;
.
ocmat:plasterormortar
  rdf:type skos:Concept ;
  rdfs:label "plaster or mortar"@en ;
  skos:broader mat:otheranthropogenicmaterial ;
  skos:definition "Plaster is a pasty material that hardens on drying and is used for coating walls, ceilings, and partitions. Mortar is a similar pasty material used for cementing bricks or block together or coating walls in building construction."@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "plaster or mortar"@en ;
.
ocmat:plastic
  rdf:type skos:Concept ;
  rdfs:label "plastic (material)"@en ;
  skos:broadMatch <https://vocab.getty.edu/aat/300014570> ;
  skos:broader ocmat:anthropogenicorganicmaterial ;
  skos:closeMatch <http://purl.obolibrary.org/obo/ENVO_06105101> ;
  skos:definition "Synthetic or semi-synthetic material that uses organic polymers as a main ingredient."@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "plastic (material)"@en ;
.
ocmat:porcelain
  rdf:type skos:Concept ;
  rdfs:label "porcelain"@en ;
  skos:broader ocmat:ceramicclay ;
  skos:definition "Kaolin rich high-fired ceramic; In China, it includes any such ware that is highly fired enough to produce a ringing sound when struck. In Europe, it is limited to hard-fired ceramic that is translucent. (https://vocab.getty.edu/aat/scopeNote/45436)"@en ;
  skos:exactMatch <https://vocab.getty.edu/aat/300010662> ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "porcelain"@en ;
.
ocmat:pumice
  rdf:type skos:Concept ;
  rdfs:label "pumice"@en ;
  skos:broader mat:rock ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "pumice"@en ;
.
ocmat:quartz
  rdf:type skos:Concept ;
  rdfs:label "quartz"@en ;
  skos:broader mat:mineral ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "quartz"@en ;
.
ocmat:rubber
  rdf:type skos:Concept ;
  rdfs:label "rubber"@en ;
  skos:broader mat:otheranthropogenicmaterial ;
  skos:definition "An elastomer, synthesized from petroleum byproducts or from latex harvested from the rubber tree (Hevea brasiliensis)."@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:narrowMatch <http://vocab.getty.edu/page/aat/300012941> ;
  skos:prefLabel "rubber"@en ;
.
ocmat:shell
  rdf:type skos:Concept ;
  rdfs:label "shell"@en ;
  skos:broader mat:biogenicnonorganicmaterial ;
  skos:definition "Hard outer covering of invertebrate creatures, composed of calcareous or chitinous material (http://vocab.getty.edu/page/aat/300011829)"@en ;
  skos:exactMatch <http://vocab.getty.edu/page/aat/300011829> ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "shell"@en ;
.
ocmat:slate
  rdf:type skos:Concept ;
  rdfs:label "slate"@en ;
  skos:broader mat:rock ;
  skos:definition "missing"@en ;
  skos:exactMatch <http://resource.geosciml.org/classifier/cgi/lithology/slate> ;
  skos:exactMatch <http://vocab.getty.edu/page/aat/300011646> ;
  skos:exactMatch <https://www.mindat.org/1:1:48638:5> ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "slate"@en ;
.
ocmat:terracotta
  rdf:type skos:Concept ;
  rdfs:label "terracotta"@en ;
  skos:broader ocmat:ceramicclay ;
  skos:definition "clay-based unglazed or glazed, porous ceramic"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "terracotta"@en ;
.
ocmat:terrasigilata
  rdf:type skos:Concept ;
  rdfs:label "terra sigilata"@en ;
  skos:broader ocmat:ceramicclay ;
  skos:definition "Fine red Ancient Roman pottery with glossy surface slips"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "terra sigilata"@en ;
.
ocmat:travertine
  rdf:type skos:Concept ;
  rdfs:label "travertine"@en ;
  skos:broader mat:rock ;
  skos:definition "A limestone consisting of a massive usually layered calcium carbonate (such as aragonite or calcite) formed by deposition from spring waters, especially from hot springs. (https://www.mindat.org/min-39057.html)"@en ;
  skos:exactMatch <https://www.mindat.org/1:1:39057:4> ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "travertine"@en ;
.
ocmat:wood
  rdf:type skos:Concept ;
  rdfs:label "wood"@en ;
  skos:broader ocmat:organicplantmaterial ;
  skos:definition "missing"@en ;
  skos:inScheme ocmat:oc_materialsvocab ;
  skos:prefLabel "wood"@en ;
.
mat:anthropogenicmetal
  rdf:type skos:Concept ;
  skos:definition "Specimen is dominantly composed of metal that has been produced or used by humans; subclass of anthropogenic material. Samples of naturally occuring metallic material (e.g. native copper, gold nuggets) should be considered mineral material. Metallic material is material that when polished or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically malleable (they can be hammered into thin sheets) or ductile (can be drawn into wires). The boundaries between metals, nonmetals, and metalloids fluctuate slightly due to a lack of universally accepted definitions of the categories involved. (https://en.wikipedia.org/wiki/Metal). c.f. http://purl.obolibrary.org/obo/ENVO_01001069"@en ;
  skos:inScheme mat:materialsvocabulary ;
  skos:prefLabel "anthropogenic metal"@en ;
  skos:topConceptOf ocmat:oc_materialsvocab ;
.
mat:biogenicnonorganicmaterial
  rdf:type skos:Concept ;
  skos:definition "Material produced by an organism but not composed of 'very large molecules of biological origin.' E.g. bone, tooth, shell, coral skeleton,"@en ;
  skos:inScheme mat:materialsvocabulary ;
  skos:prefLabel "biogenic non-organic material"@en ;
  skos:topConceptOf ocmat:oc_materialsvocab ;
.
mat:mineral
  rdf:type skos:Concept ;
  skos:definition "Material consists of a single mineral or mineraloid phase. .  'A mineral is an element or chemical compound that is normally crystalline and that has been formed as a result of geological processes.' (Nickel, Ernest H. (1995), The definition of a mineral, The Canadian Mineralogist. 33 (3): 689–90). Include mineraloids. ... A material primarily composed of some substance that is naturally occurring, solid and stable at room temperature, representable by a chemical formula, usually abiogenic, and that has an ordered atomic structure. (http://purl.obolibrary.org/obo/ENVO_01000256). Comment: the identity of a mineral species is defined by a crystal structure and a chemical composition that might include various specific elemental substitutions in that structure. Mineraloid: A naturally occurring mineral-like substance that does not demonstrate crystallinity. Mineraloids possess chemical compositions that vary beyond the generally accepted ranges for specific minerals. Examples: obsidian, Opal. (https://en.wikipedia.org/wiki/Mineraloid)"@en ;
  skos:inScheme mat:materialsvocabulary ;
  skos:prefLabel "mineral"@en ;
  skos:topConceptOf ocmat:oc_materialsvocab ;
.
mat:organicmaterial
  rdf:type skos:Concept ;
  skos:definition "Environmental material derived from living organisms and composed primarily of one or more very large molecules of biological origin. Examples: body (animal or plant), body part, fecal matter, seeds, wood, tissue, biological fluids, biological waste, algal material, biofilm, necromass, plankton. source: http://purl.obolibrary.org/obo/ENVO_01000155"@en ;
  skos:inScheme mat:materialsvocabulary ;
  skos:prefLabel "organic material"@en ;
  skos:topConceptOf ocmat:oc_materialsvocab ;
.
mat:otheranthropogenicmaterial
  rdf:type skos:Concept ;
  skos:definition "Non-metallic material produced by human activity. Organic products of agricultural activity are both anthropogenic and organic. Include lab preparations like XRF pellet and rock powders. Examples: ceramics, concrete, slag, (anthropogenic) glass, mine tailing, plaster, waste."@en ;
  skos:inScheme mat:materialsvocabulary ;
  skos:prefLabel "other anthropogenic material"@en ;
  skos:topConceptOf ocmat:oc_materialsvocab ;
.
mat:particulate
  rdf:type skos:Concept ;
  skos:definition "Material consists of microscopic particulate material derived by precipitation, filtering, or settling from suspension in a fluid, e.g. filtrate from water, deposition from atmosphere, astro material particles. Might include mineral, organic, or biological material. ENVO definition (ENVO_01000060) has \"composed of microscopic portions of solid or liquid material suspended in another environmental material.\", refine here to define as the solid particles, distinct from a material in which they are suspended. A material that includes solid or liquid particles suspended in another material would be a dispersed_media in this scheme, not defined in ENVO. Human manufactured particulates (e.g. rock powder) should be categorized as 'anthropogenic material' as well as 'Particulate'"@en ;
  skos:inScheme mat:materialsvocabulary ;
  skos:prefLabel "particulate material"@en ;
  skos:topConceptOf ocmat:oc_materialsvocab ;
.
mat:rock
  rdf:type skos:Concept ;
  skos:definition "Consolidated aggregate of particles (grains) of rock, mineral (including native elements), mineraloid, or solid organic material. Includes mineral aggregates such as granite, shale, marble; natural glass such as obsidian; organic material formed by geologic processes such a coal;  extraterrestrial material in meteorites; and  crushed rock fragments like drill cuttings from rock.  (based on http://resource.geosciml.org/classifier/cgi/lithology/rock, same as http://purl.obolibrary.org/obo/ENVO_00001995)"@en ;
  skos:inScheme mat:materialsvocabulary ;
  skos:prefLabel "rock"@en ;
  skos:topConceptOf ocmat:oc_materialsvocab ;
.