/usr/share/pgmodeler/schemas/xml/position.sch is in pgmodeler-common 0.8.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | # XML definition for object positioning
# CAUTION: Do not modify this file unless you know what you are doing.
# Code generation can be broken if incorrect changes are made.
$tb [<position x=] "{x}" [ y=] "{y}" /> $br
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