QGPKG offers read support for the GeoPackage-OWC extension. Goal of the extension is to store context and styling of a mapping project in a standardised way as part of a GeoPackage file. The specification is maintained at this repository.
The extension introduces 3 tables;
- owc_context; which stores the project context (layer order)
- owc_style; which store the layer styling
- owc_resource; stores additional resources (thumbnails, fonts, documentation)
A GeoPackage-OWC example is provided here