/usr/share/pgmodeler/conf/schemas/ is in pgmodeler-common 0.9.1~beta-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pgmodeler/conf/schemas/application-dbm.sch
/usr/share/pgmodeler/conf/schemas/commands.sch
/usr/share/pgmodeler/conf/schemas/connections.sch
/usr/share/pgmodeler/conf/schemas/desktop.sch
/usr/share/pgmodeler/conf/schemas/file.sch
/usr/share/pgmodeler/conf/schemas/objects-style.sch
/usr/share/pgmodeler/conf/schemas/patterns.sch
/usr/share/pgmodeler/conf/schemas/pgmodeler.sch
/usr/share/pgmodeler/conf/schemas/relationships.sch
/usr/share/pgmodeler/conf/schemas/snippet.sch
/usr/share/pgmodeler/conf/schemas/snippets.sch
/usr/share/pgmodeler/conf/schemas/sql-history.sch
/usr/share/pgmodeler/conf/schemas/widget.sch