{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.github.io/osisoft-pi/json-schema/osisoft-pi-point-schema.json",
  "title": "OSIsoft PI Point",
  "description": "Schema for an OSIsoft PI point (tag), the fundamental data storage unit in the PI System representing a single time-series measurement.",
  "type": "object",
  "properties": {
    "WebId": {
      "type": "string",
      "description": "PI Web API opaque unique identifier"
    },
    "Id": {
      "type": "integer",
      "description": "PI point numeric ID on the PI Data Archive"
    },
    "Name": {
      "type": "string",
      "maxLength": 80,
      "description": "PI tag name"
    },
    "Path": {
      "type": "string",
      "description": "Full PI path (\\\\ServerName\\TagName)"
    },
    "PointType": {
      "type": "string",
      "enum": ["Float16", "Float32", "Float64", "Int16", "Int32", "Digital", "Timestamp", "String"],
      "description": "PI point data type"
    },
    "EngineeringUnits": {
      "type": "string",
      "description": "Unit of measure (e.g., kPa, °C, m3/h)"
    },
    "Description": {
      "type": "string",
      "maxLength": 128,
      "description": "Tag description"
    },
    "Descriptor": {
      "type": "string",
      "maxLength": 32,
      "description": "Short descriptor"
    },
    "PointClass": {
      "type": "string",
      "description": "PI point class (classic, base, etc.)"
    },
    "Zero": {
      "type": "number",
      "description": "Zero value for analog points"
    },
    "Span": {
      "type": "number",
      "description": "Span value for analog points"
    },
    "ExcMin": {
      "type": "number",
      "description": "Exception minimum for compression"
    },
    "ExcMax": {
      "type": "number",
      "description": "Exception maximum for compression"
    },
    "Step": {
      "type": "boolean",
      "description": "True if values are step-function (digital/integer types)"
    },
    "Future": {
      "type": "boolean",
      "description": "True if future-dated values are allowed"
    },
    "Tag": {
      "type": "string",
      "description": "Tag name alias"
    },
    "Instrument": {
      "type": "string",
      "description": "Instrument tag reference"
    },
    "Location1": { "type": "integer", "description": "Location attribute 1" },
    "Location2": { "type": "integer", "description": "Location attribute 2" },
    "Location3": { "type": "integer", "description": "Location attribute 3" },
    "Location4": { "type": "integer", "description": "Location attribute 4" },
    "Location5": { "type": "integer", "description": "Location attribute 5" }
  },
  "required": ["WebId", "Name", "PointType"],
  "examples": [
    {
      "WebId": "P0UKSmL5GxNku5bXVjXV1zIgAAAUEkT0NPRFwtUEkxXFJFQUNUT1IuVEVNUC5QVjE",
      "Id": 1042,
      "Name": "REACTOR.TEMP.PV1",
      "Path": "\\\\PI-SERVER1\\REACTOR.TEMP.PV1",
      "PointType": "Float32",
      "EngineeringUnits": "°C",
      "Description": "Reactor 1 Temperature Process Variable",
      "Descriptor": "R1 Temp",
      "PointClass": "classic",
      "Zero": -50,
      "Span": 250,
      "Step": false,
      "Future": false
    }
  ]
}