{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/BioImageTools/zarr-convention-provenance/refs/tags/v0.2.0/schema.json",
  "title": "provenance Zarr convention",
  "description": "The processing steps that produced or modified a Zarr node. Validates a Zarr v3 node document (zarr.json) or a bare attributes object (a Zarr v2 .zattrs).",
  "anyOf": [{ "$ref": "#/$defs/zarr_v3_node" }, { "$ref": "#/$defs/attributes" }],
  "$defs": {
    "zarr_v3_node": {
      "type": "object",
      "required": ["zarr_format", "node_type", "attributes"],
      "properties": {
        "zarr_format": { "type": "integer" },
        "node_type": { "type": "string", "enum": ["array", "group"] },
        "attributes": { "$ref": "#/$defs/attributes" }
      }
    },
    "attributes": {
      "type": "object",
      "required": ["zarr_conventions", "provenance:steps"],
      "properties": {
        "zarr_conventions": {
          "type": "array",
          "contains": { "$ref": "#/$defs/convention_metadata" }
        },
        "provenance:steps": {
          "type": "array",
          "minItems": 1,
          "items": { "$ref": "#/$defs/step" }
        }
      }
    },
    "convention_metadata": {
      "type": "object",
      "anyOf": [{ "required": ["schema_url"] }, { "required": ["spec_url"] }, { "required": ["uuid"] }],
      "properties": {
        "schema_url": {
          "const": "https://raw.githubusercontent.com/BioImageTools/zarr-convention-provenance/refs/tags/v0.2.0/schema.json"
        },
        "spec_url": {
          "const": "https://github.com/BioImageTools/zarr-convention-provenance/blob/v0.2.0/README.md"
        },
        "uuid": { "const": "0d4ef942-0f74-4187-ae72-016ddf083fe1" },
        "name": { "const": "provenance:" },
        "description": { "type": "string" }
      },
      "additionalProperties": false
    },
    "step": {
      "type": "object",
      "required": ["software"],
      "properties": {
        "software": { "$ref": "#/$defs/software" },
        "name": { "type": "string", "minLength": 1 },
        "category": { "type": "string", "minLength": 1 },
        "category_terms": { "type": "array", "items": { "$ref": "#/$defs/term" } },
        "description": { "type": "string" },
        "parameters": { "type": "object" },
        "inputs": { "type": "array", "items": { "$ref": "#/$defs/data_reference" } },
        "outputs": { "type": "array", "items": { "$ref": "#/$defs/data_reference" } },
        "started": { "$ref": "#/$defs/date_time" },
        "ended": { "$ref": "#/$defs/date_time" },
        "environment": { "$ref": "#/$defs/data_reference" }
      }
    },
    "software": {
      "type": "object",
      "required": ["name", "version"],
      "properties": {
        "name": { "type": "string", "minLength": 1 },
        "version": { "type": "string", "minLength": 1 },
        "entry_point": { "type": "string", "minLength": 1 },
        "uri": { "type": "string", "format": "uri" }
      }
    },
    "data_reference": {
      "type": "object",
      "anyOf": [{ "required": ["path"] }, { "required": ["uri"] }, { "required": ["id"] }],
      "properties": {
        "path": { "type": "string", "minLength": 1 },
        "uri": { "type": "string", "format": "uri" },
        "id": { "type": "string", "minLength": 1 },
        "name": { "type": "string" },
        "type": { "$ref": "#/$defs/term" },
        "format": { "$ref": "#/$defs/term" },
        "checksum": { "$ref": "#/$defs/checksum" }
      }
    },
    "term": {
      "type": "object",
      "properties": {
        "uri": { "type": "string", "format": "uri" },
        "label": { "type": "string", "minLength": 1 },
        "ontology": { "type": "string", "minLength": 1 }
      }
    },
    "checksum": { "type": "string", "pattern": "^[a-z0-9-]+:[0-9a-f]+$" },
    "date_time": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(\\.\\d+)?(Z|[+-]\\d{2}:\\d{2})$"
    }
  }
}