In my understanding as the primary key of gpkg_tile_matrix_set is the same as the one of gpkg_contents (table_name) the association in the diagram should be 1..1 instead of 1..0-*
An other possibility is to have srs_id column included in the gpkg_tile_matrix_set primary key, allowing to store multiple projections of the same content. But in this case the srs_id column shall also be added in the gpkg_tile_matrix table and primary key.
In my understanding as the primary key of
gpkg_tile_matrix_setis the same as the one ofgpkg_contents(table_name) the association in the diagram should be 1..1 instead of 1..0-*An other possibility is to have
srs_idcolumn included in thegpkg_tile_matrix_setprimary key, allowing to store multiple projections of the same content. But in this case thesrs_idcolumn shall also be added in thegpkg_tile_matrixtable and primary key.