{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "basis.schema.json",
  "title": "Vector Basis Definition",
  "description": "Formal definition of a vector basis (B_viz or B_score) for the civilizational state space.",
  "type": "object",
  "required": ["id", "version", "dimensions", "axes", "domain", "sources"],
  "properties": {
    "id": {
      "type": "string",
      "enum": ["B_viz", "B_score"]
    },
    "version": {
      "type": "string",
      "pattern": "^[0-9]+\\.[0-9]+\\.[0-9]+$"
    },
    "label": {
      "type": "string"
    },
    "dimensions": {
      "type": "integer",
      "minimum": 1
    },
    "axes": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": ["id", "label", "source", "domain"],
        "properties": {
          "id": { "type": "string" },
          "label": { "type": "string" },
          "source": { "type": "string" },
          "domain": {
            "type": "array",
            "minItems": 2,
            "maxItems": 2,
            "items": { "type": "number" }
          },
          "interpretation_low": { "type": "string" },
          "interpretation_high": { "type": "string" }
        }
      }
    },
    "orthogonality": {
      "type": "string",
      "enum": ["empirical_orthogonal_by_construction", "assumed_orthogonal", "non_orthogonal"]
    },
    "domain": {
      "type": "array",
      "items": {
        "type": "array",
        "minItems": 2,
        "maxItems": 2,
        "items": { "type": "number" }
      }
    },
    "sources": {
      "type": "array",
      "minItems": 1,
      "items": { "type": "string" }
    }
  },
  "additionalProperties": false
}