{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "monomer://schema/semantic/time-spine/1",
  "title": "Semantic Time Spine Definition",
  "type": "object",
  "required": ["schemaVersion", "timeSpines"],
  "additionalProperties": false,
  "properties": {
    "schemaVersion": { "const": 1 },
    "timeSpines": {
      "type": "array",
      "minItems": 1,
      "items": { "$ref": "#/$defs/timeSpine" }
    }
  },
  "$defs": {
    "addressPart": {
      "type": "string",
      "minLength": 1,
      "maxLength": 1024,
      "pattern": "^[^\\u0000]*$"
    },
    "granularity": {
      "enum": [
        "nanosecond",
        "microsecond",
        "millisecond",
        "second",
        "minute",
        "hour",
        "day",
        "week",
        "month",
        "quarter",
        "year"
      ]
    },
    "relation": {
      "type": "object",
      "required": ["schema", "relation"],
      "additionalProperties": false,
      "properties": {
        "catalog": { "$ref": "#/$defs/addressPart" },
        "schema": { "$ref": "#/$defs/addressPart" },
        "relation": { "$ref": "#/$defs/addressPart" }
      }
    },
    "primaryColumn": {
      "type": "object",
      "required": ["name", "granularity"],
      "additionalProperties": false,
      "properties": {
        "name": { "$ref": "#/$defs/addressPart" },
        "granularity": { "$ref": "#/$defs/granularity" }
      }
    },
    "timeSpine": {
      "type": "object",
      "required": ["relation", "primaryColumn"],
      "additionalProperties": false,
      "properties": {
        "relation": { "$ref": "#/$defs/relation" },
        "primaryColumn": { "$ref": "#/$defs/primaryColumn" }
      }
    }
  }
}