XMP Metadata

Status: proposal

Author: Viatrix

Submission date: 2025-08-13

Implementations: exiftool, picrew-downloader

The proposed feature is: Allow metadata in the XMP format to be placed within an OpenRaster file at the path META-INF/metadata.xml.

This is useful for including general metadata (a title, a comment, etc.), or usage-specific metadata should the need arise.

Impact on applications

This feature specifies metadata only and does not change the layer stack or image data. As such, applications which do not recognize the feature can display the image normally.

The file META-INF/metadata.xml is used for XMP metadata in a number of OpenDocument-descended file formats. As such, existing applications may successfully locate the metadata at this path (such as exiftool did).