{
  "$schema": "https://etalii.net/adp/desl/schema/0.1/desl.schema.json#/$defs/Specification",
  "desl": "0.1",
  "doc": "DESL's smallest example: a reading list, one row per book, with text and number fields and one view.",
  "language": { "id": "net.etalii.adp.example.reading-list", "version": "0.1.0", "origin": "example/reading-list", "label": "Reading list" },
  "metamodel": {
    "types": {
      "Field": {
        "attributes": { "name": { "type": "string", "required": true }, "valueType": { "type": "ValueType", "required": true } },
        "labelAttribute": "name"
      },
      "View": { "attributes": { "name": { "type": "string", "required": true } }, "labelAttribute": "name" },
      "Book": { "children": { "allowed": ["Value"], "ordered": true, "slots": { "values": { "allowed": ["Value"] } } } },
      "Value": { "attributes": { "field": { "type": "Field", "required": true }, "text": { "type": "text" }, "number": { "type": "number" } } }
    },
    "enums": { "ValueType": { "values": { "text": { "label": "Text" }, "number": { "label": "Number" } } } }
  },
  "persistence": {
    "format": "fbl",
    "bindings": ["minimal-table.fbl#yaml"],
    "ids": {
      "strategy": "uuid-v4",
      "encoding": "base36",
      "types": { "Value": { "strategy": "derived", "expression": "self.parent.id + '/' + self.field.id" } }
    }
  },
  "constraints": {
    "rules": [
      {
        "id": "uniqueFieldNames",
        "code": "reading-list.duplicate-field-name",
        "scope": ["Field"],
        "severity": "error",
        "rule": "document.elementsOfType('Field').filter(f, f.name == self.name).size() == 1",
        "message": "Two fields have this name."
      }
    ]
  },
  "surface": {
    "kind": "table",
    "columns": { "type": "Field", "name": "name", "valueType": "valueType" },
    "rows": { "type": "Book" },
    "cells": { "type": "Value", "column": "field" },
    "views": { "type": "View", "name": "name" },
    "valueTypes": {
      "text": { "label": "Text", "key": "text", "editor": "text", "comparisons": ["is", "contains"], "sort": "text", "converts": { "number": "parse" } },
      "number": {
        "label": "Number",
        "key": "number",
        "editor": "number",
        "comparisons": ["equals", "greater-than", "less-than"],
        "sort": "number",
        "converts": { "text": "written-form" }
      }
    }
  },
  "operations": { "addBook": { "label": "New book", "for": "document", "actions": [{ "create": { "type": "'Book'" } }] } }
}