worker_training_session contract v1

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://docs.demiton.io/registers/worker_training_session/v1.json",
  "title": "worker_training_session contract v1",
  "type": "object",
  "required": [
    "external_id",
    "occurred_at",
    "worker"
  ],
  "properties": {
    "asset": {
      "type": "string",
      "description": "the plant/equipment the session related to, when the source supplies it",
      "x-demiton-requiredness": "optional",
      "x-demiton-reference": true
    },
    "worker": {
      "type": "string",
      "description": "the worker whose attendance/completion the record is",
      "x-demiton-requiredness": "required",
      "x-demiton-reference": true
    },
    "session": {
      "type": "string",
      "description": "the session the worker attended, when the source supplies a stable session identifier",
      "x-demiton-requiredness": "optional",
      "x-demiton-reference": true
    },
    "external_id": {
      "type": "string",
      "description": "the source record's own identifier, as text",
      "x-demiton-requiredness": "required"
    },
    "occurred_at": {
      "type": "string",
      "description": "when the session/submission occurred - the sole temporal anchor",
      "x-demiton-requiredness": "required",
      "format": "date-time",
      "x-demiton-type": "datetime"
    },
    "session_label": {
      "type": "string",
      "description": "the tenant's own name for the training session (the Assignar form title, e.g. a Verification of Competency form)",
      "x-demiton-requiredness": "tenant-specific"
    }
  },
  "x-demiton-register-type": "worker_training_session",
  "x-demiton-contract-version": "1.0.1",
  "x-demiton-store": "tenant",
  "x-demiton-axes": [
    {
      "axis": "worker",
      "requirement": "required",
      "role": "subject"
    },
    {
      "axis": "asset",
      "requirement": "optional",
      "role": "subject"
    }
  ],
  "x-demiton-measures": [],
  "x-demiton-provenance": {
    "standards": []
  },
  "description": "The Worker training session register contract, version 1. JSON Schema (draft 2020-12); x-demiton-* keywords carry Demiton's own meaning and standard validators ignore them.",
  "x-demiton-contract-url": "https://docs.demiton.io/registers/worker_training_session/",
  "x-demiton-register-catalog": "https://docs.demiton.io/concepts/register-catalog"
}