/usr/share/pgmodeler/conf/schemas/file.sch is in pgmodeler-common 0.9.1~beta-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # XML definition for files opened on a session
# CAUTION: Do not modify this file unless you know what you are doing.
$tb [<file id="] {id} [" path="] {path}" /> $br
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