📑What Metadata is Stored

Learn what metadata is held by default in content entries and is available for you to query.

Aside from metadata you add to each individual content entry, you are also able to query for metadata automatically generated by the platform for each individual content entry.

Different asset types and target types can determine the automatically generated metadata available.

Any Content Entry

These metadata keys are available for any content entry regardless of the asset type or target type.

Key	Type	Description	Value Example
createdAt	Number	Timestamp in UTC format of the time the content was created	1587258208433
lastAccessed	Number	Timestamp in UTC format of the last time the content was accessed	1587248667634
accessHistory	Array	A collection of timestamps in UTC format of the times the content was accessed	[\"1587253222904\"]
usageByDate	Object	A collection of dates in human readable format in which the content was used and a counter of the overall time it was used.	[{\"date\":\"2020-04-18\",\"numUses\":12.0}]
qrWebXRStorageFilename	String	Filename of a QR image redirecting to a sample WebXR experience that shows this asset	qr_webxr_my_key_1234.png
qrWebXRStorageID	String	Storage ID of a QR image redirecting to a sample WebXR experience that uses this asset	9d39d3f4-68f5-49ae-a798-903ac249f073
qrARjsStorageFilename	String	Filename of a QR image redirecting to a sample AR.js experience that shows this asset	qr_arjs_my_key_1234.png
qrARjsStorageID	String	Storage ID of a QR image redirecting to a sample AR.js experience that shows this asset	fd3f4c85-5d47-40ea-a38c-9aeb728f780b
qrARjsTargetStorageFilename	String	Filename of the target file used for a sample AR.js experience that shows this asset	qr_arjs_my_key_1234.patt
qrARjsTargetStorageID	String	Storage ID of the target file used for a sample AR.js experience that shows this asset	ce090285-8b88-4b12-b9d3-da6490298da2
qrARjsMarkerStorageFilename	String	Filename of the image marker file used for a sample AR.js experience that shows this asset	marker_qr_arjs_my_key_1234.png
qrARjsMarkerStorageID	String	Storage ID of a QR image redirecting to a sample AR.js experience that uses this asset and doubles as a marker	bb9e8709-a882-49fe-a3d1-9804fa452ba4
source	String	Credit attribution to the creator of the asset	Skyscraper by Poly by Google, CC-BY

Specific Asset Types

These metadata keys are available for content entries with specific asset types.

Model Assets

Key	Type	Description	Value Example
glbHologramStorageFilename	String	Filename of a .glb version of the 3D model, if such exists	Skyscraper.glb
glbHologramStorageID	String	Storage ID of a .glb version of the 3D model, if such exists.	d686a655-e800-430d-bfd2-e38cdfb0c9e9.glb
usdzHologramStorageFilename	String	Filename of a .usdz version of the 3D model, if such exists	Skyscraper.usdz
usdzHologramStorageID	String	Storage ID of a .usdz version of the 3D model, if such exists.	d686a655-e800-430d-bfd2-e38cdfb0c9e9.usdz
vuforiaHologramStorageFilename	String	Filename of a .h version of the 3D model, if such exists	Skyscraper.h
vuforiaHologramStorageID	String	Storage ID of a .h version of the 3D model, if such exists.	7068cd74-6c9f-4106-9326-585c56fa4475
shortURL	String	A short shareable URL which automatically redirects to the model	https://go.echo3d.co/24m3

Video Assets

Key	Type	Description	Value Example
height	Number	Height of the video frame	360
width	Number	Width of the video frame	460

Image Assets

Key	Type	Description	Value Example
height	Number	Height of the video frame	360
width	Number	Width of the video frame	460
compressedImageStorageID	String	Storage ID of the compressed version of the image uploaded by the user, if such exists.	d2c42d32-dd13-4541-b446-89dcf8e4bcb4

Specific Target Types

These metadata keys are available for content entries with specific target types.

Surface Targets

No additional metadata for surface targets.

Location Targets

No additional metadata for location targets.

Image Targets

Key	Type	Description	Value Example
originalImageStorageID	String	Storage ID of the original image uploaded by the user before being compressed, if such exists.	d2c42d32-dd13-4541-b446-89dcf8e4bcb4
arjsTargetStorageFilename	String	Filename of the target file used for a sample AR.js experience that shows this asset	air.patt
arjsTargetStorageID	String	Storage name of the target file used for a sample AR.js experience that shows this asset	f6607f7b-aee2-4cc8-87e1-97be5a6c36a6
arcoreTargetStorageFilename	String	Filename of the target file used for a sample AR.js experience that shows this asset	air.imgdb
arcoreTargetStorageID	String	Storage ID of the target file used for a sample AR.js experience that shows this asset	420c746a-34e3-4535-b9ba-a4c14b4cc881
arjsMarkerStorageFilename	String	Filename of the image marker file used for a sample AR.js experience that shows this asset	marker_air.png
arjsMarkerStorageID	String	Storage ID of the image marker file used for a sample AR.js experience that shows this asset	440c117a-5b11-4380-8d1d-6d54d3889c08
vuforiaTargetID	String	Target ID of the image used by Vuforia Cloud Recognition	6309204a74d842a8b 6917e6aef743088