generated: '2026-07-19'
method: searched
source: https://docs.echo3d.com/api/objects
note: >-
  Entity graph derived from the documented echo3D API object structures
  (content entries, targets, holograms) and the upload response example.
entities:
- name: Collection
  description: >-
    A project/workspace identified by an API key that contains content entries,
    users, groups, metadata taxonomy, and settings.
  identifier: key
  id_shape: "adjective-noun-NNNN (e.g. some-words-1234)"
  relationships:
  - has_many: ContentEntry
    via: key
  - has_many: GlobalData
    via: key
- name: ContentEntry
  description: >-
    A unit of content in a collection, pairing an AR target with one or more
    holograms plus metadata, tags, status, versions, and hierarchy.
  identifier: id
  id_shape: uuid
  relationships:
  - belongs_to: Collection
    via: key
  - has_one: Target
    via: target
  - has_many: Hologram
    via: holograms
  - has_many: Metadata
    via: data
  - has_many: AssetVersion
    via: versionIds
  - has_one: AssetStatus
    via: status
  - belongs_to: ContentEntry
    via: parent (asset hierarchy)
- name: Target
  description: >-
    The AR anchor for an entry. Types: BRICK_TARGET (no target),
    IMAGE_TARGET, GEOLOCATION_TARGET.
  identifier: id
  id_shape: uuid
  fields: [type]
  relationships:
  - has_many: Hologram
    via: holograms
- name: Hologram
  description: >-
    The renderable asset attached to a target. Types: MODEL_HOLOGRAM,
    VIDEO_HOLOGRAM, IMAGE_HOLOGRAM.
  identifier: id
  id_shape: uuid
  fields:
  - filename
  - storageID
  - textureFilenames
  - textureStorageIDs
  - materialFilename
  - materialStorageID
  - type
  - targetID
  relationships:
  - belongs_to: Target
    via: targetID
- name: Metadata
  description: Key/value pairs attached to an entry or collection (format key:value;...).
  relationships:
  - belongs_to: ContentEntry
    via: entryId
- name: GlobalData
  description: Collection-level global data key/value entries (managed via /post and /get).
  relationships:
  - belongs_to: Collection
    via: key
- name: AssetVersion
  description: A saved version of an asset that can be reverted to.
  identifier: versionId
  relationships:
  - belongs_to: ContentEntry
    via: entryId
- name: AssetStatus
  description: A status label assigned to an asset to track progress across teams.
  relationships:
  - belongs_to: ContentEntry
    via: entryId