{
  "$schema": "http://json-schema.org/schema#",
  "$schemaVersion": "0.0.4",
  "modelTags": "",
  "$id": "https://smart-data-models.github.io/dataModel.WaterQuality/WaterQualityObserved/schema.json",
  "title": " - Water quality observed schema",
  "description": "Water Quality data model is intended to represent water quality parameters at a certain water mass (river,  lake, sea, etc.) section",
  "type": "object",
  "allOf": [
    {
      "$ref": "https://smart-data-models.github.io/data-models/common-schema.json#/definitions/GSMA-Commons"
    },
    {
      "$ref": "https://smart-data-models.github.io/data-models/common-schema.json#/definitions/Location-Commons"
    },
    {
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "WaterQualityObserved"
          ],
          "description": "Property. NGSI Entity type. It has to be WaterQualityObserved"
        },
        "dateObserved": {
          "type": "string",
          "description": "Property. Model:'https://schema.org/DateTime'. The date and time of this observation in ISO8601 UTCformat. It can be represented by an specific time instant or by an ISO8601 interval."
        },
        "measurand": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "minItems": 1,
          "description": "Property. An array of strings containing details (see format below) about extra measurands provided by this observation."
        },
        "temperature": {
          "type": "number",
          "description": "Property. Temperature"
        },
        "bod": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Biochemical oxygen demand (BOD) is the amount of dissolved oxygen (DO) needed (i.e. demanded) by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. Units:'mg/l'"
        },
        "cod": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Chemical oxygen demand (COD) is an indicative measure of the amount of oxygen that can be consumed by reactions in a measured solution. Units:'mg/l'"
        },
        "conductivity": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Electrical Conductivity."
        },
        "conductance": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Specific Conductance."
        },
        "tss": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Total suspended solids."
        },
        "tds": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Total dissolved solids. "
        },
        "turbidity": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Amount of light scattered by particles in the water column"
        },
        "salinity": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Amount of salts dissolved in water."
        },
        "pH": {
          "type": "number",
          "minimum": 0,
          "maximum": 14,
          "description": "Property. Acidity or basicity of an aqueous solution."
        },
        "orp": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Oxidation-Reduction potential."
        },
        "O2": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Level of free, non-compound oxygen present."
        },
        "Chla": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Concentration of chlorophyll A."
        },
        "PE": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Concentration of pigment phycoerythrin which can be measured to estimate cyanobacteria concentrations specifically."
        },
        "PC": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Concentration of pigment phycocyanin which can be measured to estimate cyanobacteria concentrations specifically."
        },
        "NH4": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Concentration of ammonium."
        },
        "NH3": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Concentration of ammonia."
        },
        "Cl-": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Concentration of chlorides."
        },
        "NO3": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Concentration of nitrates."
        },
        "PO4": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Concentration of phosphates."
        },
        "escherichiaColi": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Concentration of Escherichia coli. Units:'Total number of bacteria/100mL'"
        },
        "enterococci": {
          "type": "number",
          "minimum": 0,
          "description": "Property. Concentration of Enterococci. Units:'Total number of bacteria/100mL'"
        },
        "refPointOfInterest": {
          "anyOf": [
            {
              "type": "string",
              "minLength": 1,
              "maxLength": 256,
              "pattern": "^[\\w\\-\\.\\{\\}\\$\\+\\*\\[\\]`|~^@!,:\\\\]+$",
              "description": "Property. Identifier format of any NGSI entity"
            },
            {
              "type": "string",
              "format": "uri",
              "description": "Property. Identifier format of any NGSI entity"
            }
          ],
          "description": "Relationship. A reference to a point of interest associated to this observation."
        }
      }
    }
  ],
  "required": [
    "id",
    "type",
    "dateObserved",
    "location"
  ]
}