CAD

Use this contract for CAD drawing results. It is designed for teams that need to move drawings into downstream automation, search, RAG, estimation, analytics, and audit workflows while keeping geometry, layers, and entity structure readable in the public output.

Top-level envelope

{
  "schema_version": "1.0",
  "document": {},
  "warnings": [],
  "content": []
}

Document fields

Field	Notes
`format`	Normalized source format such as `DWG` or `DXF`.
`format_family`	Always `cad`.
`document_name`	Display name for the drawing.
`source_file`	Preserved source file name.
`source_format`	Raw source format label.
`document_format`	Document format label when present.
`units`	Normalized consumer-facing units.
`source_units`	Source unit label when present.
`version`	Drawing version.
`title`, `subject`, `company`	Reserved document metadata.
`schema_version`, `schemaVersion`	Public contract markers.
`author`, `source_author`	Normalized author and raw source author.
`created`	Creation timestamp when available.
`source_engine`	Parser identity.
`metadata`	Additive document metadata.
`extents`	Drawing-level extents.
`layer_count`, `block_count`, `block_entity_count`, `entity_count`	Summary counts when available.
`layers`, `blocks`, `blockEntities`, `entities`	Public drawing collections.

Universal content/block shape

CAD content records use the public base record shape when they are materialized as records.

Field	Notes
`id`	Stable record id.
`type`	Public record type.
`order`	Deterministic emission order when present.
`path`	Stable public path or hierarchy label.
`parent_id`	Parent record id when relevant.
`depth`	Structural depth.
`source_ref`	Provenance object when available.
`is_inferred`	Indicates whether the record was inferred.
`warnings`	Record-local human-readable notes.
`content_hash`	Optional orchestrator hash.
`text`	Plain-text projection for search.
`attributes`	CAD-specific structured data.

Entity records can also carry geometry, bbox, centroid, wkt, coverageState, space, containerId, children, relations, and properties.

Warnings

warnings is always present.
Use plain strings.
Keep warnings human-readable.
Do not use warnings to hide loss of geometry or identity.

What clients can rely on

Drawing identity stays stable.
Layer, block, and entity names stay public and readable.
Geometry and traceability stay separate.
Additive fields do not break older clients.
The public contract does not expose internal transport or worker details.

Example

{
  "schema_version": "1.0",
  "document": {
    "format": "DWG",
    "format_family": "cad",
    "document_name": "drawing.dwg",
    "source_file": "drawing.dwg",
    "units": "Millimeters",
    "version": "AC1032",
    "metadata": {},
    "layers": [],
    "blocks": [],
    "blockEntities": {},
    "entities": [
      {
        "id": "A1",
        "type": "LINE",
        "space": "model",
        "containerId": "25",
        "properties": {}
      }
    ]
  },
  "warnings": [],
  "content": []
}

Documentation Index

​CAD

​Top-level envelope

​Document fields

​Universal content/block shape

​Warnings

​What clients can rely on

​Example

CAD