Metadata is additional information about the asset that can be searched. It is automatically extracted when you upload an image. You can edit the existing metadata or add new metadata properties to existing fields (for example, when a metadata field is blank).
Because companies need controlled and reliable metadata vocabularies, AEM Assets does not allow for adhoc adding of new metadata properties. Although authors cannot add new metadata fields for assets, developers can. See Creating New Metadata Property for Assets.
To edit metadata:
Do one of the following:
The asset page displays all of the asset’s metadata. This metadata was automatically extracted when it was uploaded (ingested) into AEM Assets.
Make edits to the metadata under the various tabs, as required, and when completed, click/tap Save from the toolbar to save your changes. Click/tap Close to return to the Assets web interface.
If a text field is empty, there is no existing metadata set. You can enter a value into the field and save it to add that metadata property.
Any changes to the metadata of an asset are written back to the original binary as part of its XMP data. This is done via AEM’s Metadata write-back workflow. Changes made to the existing properties (such as
dc:title) are overwritten and newly created properties (including custom properties like
cq:tags) are added together with the schema.
XMP write-back is supported and enabled for the platforms and file formats described in Technical Requirements.
For details on how to edit metadata schema, see Editing metadata schema forms.
You can add your own namespaces within AEM. Just as there are predefined namespaces such as cq, jcr and sling, you can have a namespace for your repository metadata and xml processing.
Go to the node type administration page
Click or tap Namespaces at the top of the page. The namespace administration page is displayed in a window.
To add a namespace, click or tap New at the bottom.
Specify a custom namespace in the XML namespace convention (Specify the id in the form of a URI and an associated prefix for the id), and click or tap Save.
dcnamespace. Any updates made via the HTTP API changes the metadata properties in the
jcrnamespace. See how to update metadata using HTTP API.