{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Service Node",
  "description": "A single node in a service template",
  "type": "object",
  "required": ["type"],
  "properties": {
    "type": {
      "type": "string",
      "enum": [
        "TITLE", "SUBTITLE", "GET", "CREATE", "TEXT", "GETID",
        "BIBLE", "TIMES", "TONE", "SERVICES", "LANGUAGE"
      ],
      "description": "Node type discriminator"
    },
    "cmd": {
      "type": "string",
      "description": "Boolean expression for conditional inclusion"
    },
    "who": {
      "type": "string",
      "description": "Speaker identifier (P=Riest, R=Reader, D=Deacon, C=Choir)"
    },
    "redfirst": {
      "type": "boolean",
      "description": "Render first letter in red"
    },
    "newline": {
      "type": "boolean",
      "description": "Add line break before text"
    },
    "header": {
      "type": "boolean",
      "description": "Generate section header"
    },
    "null": {
      "type": "boolean",
      "description": "Skip if content is empty"
    },
    "times": {
      "type": "integer",
      "minimum": 1,
      "description": "Number of times to repeat"
    },
    "command": {
      "type": "string",
      "description": "Rubric text command name"
    },
    "commandB": {
      "type": "string",
      "description": "Prepend rubric text command name"
    }
  },
  "oneOf": [
    {
      "properties": {
        "type": { "const": "TITLE" },
        "value": { "type": "string" },
        "source": { "type": "string" },
        "comment": { "type": "string" }
      },
      "required": ["value"]
    },
    {
      "properties": {
        "type": { "const": "SUBTITLE" },
        "value": { "type": "string" },
        "comment": { "type": "string" }
      },
      "required": ["value"]
    },
    {
      "properties": {
        "type": { "const": "GET" },
        "file": { "type": "string" }
      },
      "required": ["file"]
    },
    {
      "properties": {
        "type": { "const": "CREATE" },
        "what": { "type": "string" }
      },
      "required": ["what"]
    },
    {
      "properties": {
        "type": { "enum": ["TEXT", "text"] },
        "what": { "type": "string" },
        "value": { "type": "string" }
      }
    },
    {
      "properties": {
        "type": { "const": "GETID" },
        "id": { "type": "string" },
        "what": { "type": "string" }
      },
      "required": ["id", "what"]
    },
    {
      "properties": {
        "type": { "const": "BIBLE" },
        "verses": { "type": "string" },
        "getreading": { "type": "boolean" },
        "twostars": { "type": "boolean" }
      }
    },
    {
      "properties": {
        "type": { "const": "TIMES" }
      }
    },
    {
      "properties": {
        "type": { "const": "TONE" }
      }
    },
    {
      "properties": {
        "type": { "const": "SERVICES" }
      }
    },
    {
      "properties": {
        "type": { "const": "LANGUAGE" }
      }
    }
  ],
  "additionalProperties": true
}