SCADA · JSON-LD Context

Scada Context

JSON-LD context defining the semantic vocabulary for Scada from SCADA.

6 Classes 23 Properties 6 Namespaces

View Context View on GitHub

Namespaces

scada: https://schema.scada.example.com/ontology#

schema: https://schema.org/

xsd: http://www.w3.org/2001/XMLSchema#

ssn: http://www.w3.org/ns/ssn/

sosa: http://www.w3.org/ns/sosa/

iot: http://iotschema.org/

Classes

Device name description identifier dateCreated dateModified

Properties

Property	Type	Container
ScadaSystem	reference
PLCDevice	reference
Tag	reference
Alarm	reference
Historian	reference
ProcessArea	reference
HMI	reference
RTU	reference
Sensor	reference
Observation	reference
tagName	string
tagValue
tagDataType	string
timestamp	dateTime
quality	string
alarmState	string
alarmPriority	integer
alarmMessage	string
engineeringUnits	string
highHighLimit	decimal
highLimit	decimal
lowLimit	decimal
lowLowLimit	decimal

JSON-LD Document

{
  "@context": {
    "@version": 1.1,
    "scada": "https://schema.scada.example.com/ontology#",
    "schema": "https://schema.org/",
    "xsd": "http://www.w3.org/2001/XMLSchema#",
    "ssn": "http://www.w3.org/ns/ssn/",
    "sosa": "http://www.w3.org/ns/sosa/",
    "iot": "http://iotschema.org/",

    "ScadaSystem": {
      "@id": "scada:ScadaSystem",
      "@type": "@id",
      "comment": "A Supervisory Control and Data Acquisition system"
    },
    "PLCDevice": {
      "@id": "scada:PLCDevice",
      "@type": "@id",
      "comment": "A Programmable Logic Controller (PLC) connected to the SCADA network"
    },
    "Tag": {
      "@id": "scada:Tag",
      "@type": "@id",
      "comment": "A SCADA data point representing a sensor, setpoint, or control variable"
    },
    "Alarm": {
      "@id": "scada:Alarm",
      "@type": "@id",
      "comment": "A SCADA alarm triggered when a tag value crosses a threshold"
    },
    "Historian": {
      "@id": "scada:Historian",
      "@type": "@id",
      "comment": "A time-series database that stores historical process data from SCADA"
    },
    "ProcessArea": {
      "@id": "scada:ProcessArea",
      "@type": "@id",
      "comment": "A logical grouping of equipment within a SCADA system"
    },
    "HMI": {
      "@id": "scada:HMI",
      "@type": "@id",
      "comment": "Human-Machine Interface for operator visualization and control"
    },
    "RTU": {
      "@id": "scada:RTU",
      "@type": "@id",
      "comment": "Remote Terminal Unit - a field device that collects data from sensors"
    },
    "Sensor": {
      "@id": "sosa:Sensor",
      "@type": "@id",
      "comment": "A physical device measuring an industrial process variable"
    },
    "Observation": {
      "@id": "sosa:Observation",
      "@type": "@id",
      "comment": "A measurement reading from a sensor at a specific time"
    },

    "tagName": {
      "@id": "scada:tagName",
      "@type": "xsd:string"
    },
    "tagValue": {
      "@id": "scada:tagValue"
    },
    "tagDataType": {
      "@id": "scada:tagDataType",
      "@type": "xsd:string"
    },
    "timestamp": {
      "@id": "scada:timestamp",
      "@type": "xsd:dateTime"
    },
    "quality": {
      "@id": "scada:quality",
      "@type": "xsd:string"
    },
    "alarmState": {
      "@id": "scada:alarmState",
      "@type": "xsd:string"
    },
    "alarmPriority": {
      "@id": "scada:alarmPriority",
      "@type": "xsd:integer"
    },
    "alarmMessage": {
      "@id": "scada:alarmMessage",
      "@type": "xsd:string"
    },
    "engineeringUnits": {
      "@id": "scada:engineeringUnits",
      "@type": "xsd:string"
    },
    "highHighLimit": {
      "@id": "scada:highHighLimit",
      "@type": "xsd:decimal"
    },
    "highLimit": {
      "@id": "scada:highLimit",
      "@type": "xsd:decimal"
    },
    "lowLimit": {
      "@id": "scada:lowLimit",
      "@type": "xsd:decimal"
    },
    "lowLowLimit": {
      "@id": "scada:lowLowLimit",
      "@type": "xsd:decimal"
    },

    "Device": "schema:Device",
    "name": "schema:name",
    "description": "schema:description",
    "identifier": "schema:identifier",
    "dateCreated": "schema:dateCreated",
    "dateModified": "schema:dateModified"
  }
}