{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://schemas.openplantfloor.org/standard/common.schema.json",
  "version": "0.2.0",
  "title": "Open Plant Floor common definitions",
  "description": "Definitions the Open Plant Floor schemas share: identifiers, the processes a machine performs, parameters with their units, quantities, the evidence grade a figure carries, and its source.",
  "definitions": {
    "identifier": {
      "type": "string",
      "pattern": "^[a-z0-9][a-z0-9._-]*(:[a-z0-9][a-z0-9._-]*)*$",
      "description": "A stable identifier within its issuer's namespace, lower case, colon-separated segments (for example shop-1:laser-01)."
    },
    "process": {
      "type": "string",
      "enum": [
        "laser-cut",
        "plasma-cut",
        "waterjet-cut",
        "tube-laser-cut",
        "saw-cut",
        "punch",
        "press-brake",
        "tube-bend",
        "roll",
        "weld-robotic",
        "weld-manual",
        "turn",
        "mill",
        "drill",
        "grind",
        "deburr",
        "mark",
        "measure",
        "assemble",
        "kit",
        "pack",
        "coat",
        "other"
      ],
      "description": "What the operation does to the work, named by its process family."
    },
    "parameter": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "name",
        "unit"
      ],
      "description": "A named parameter with its unit and the range or values it takes. Work is matched to equipment by comparing a job's parameters with a machine's.",
      "properties": {
        "name": {
          "type": "string",
          "minLength": 1,
          "description": "The parameter, for example thickness, length, outer-diameter, wall-thickness, bend-length, force, material."
        },
        "unit": {
          "type": "string",
          "minLength": 1,
          "description": "SI unit symbol (mm, kN, kW, kg, s), or 'text' for a categorical value such as a material."
        },
        "min": {
          "type": "number"
        },
        "max": {
          "type": "number"
        },
        "values": {
          "type": "array",
          "items": {
            "type": [
              "string",
              "number"
            ]
          },
          "minItems": 1,
          "uniqueItems": true,
          "description": "The discrete values it takes, when not a range."
        }
      }
    },
    "quantity": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "value",
        "unit"
      ],
      "properties": {
        "value": {
          "type": "number",
          "minimum": 0
        },
        "unit": {
          "type": "string",
          "minLength": 1,
          "description": "part, kit, lot, m, kg, or another counted unit."
        }
      }
    },
    "evidence": {
      "type": "string",
      "enum": [
        "L0",
        "L1",
        "L2",
        "L3"
      ],
      "description": "How the figure is known: L0 estimate, L1 published benchmark, L2 quote or listing, L3 contracted or measured."
    },
    "source": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "kind"
      ],
      "properties": {
        "kind": {
          "type": "string",
          "enum": [
            "equipment-owner",
            "manufacturer",
            "measurement",
            "simulation",
            "estimate",
            "other"
          ]
        },
        "reference": {
          "type": "string",
          "description": "Where the figure can be checked: a document title, a measurement record, a manufacturer specification."
        },
        "asOf": {
          "type": "string",
          "format": "date"
        },
        "url": {
          "type": "string",
          "format": "uri",
          "description": "Where the figure is published, when it is published online."
        }
      }
    }
  }
}