/usr/share/pgmodeler/schemas/xml/dtd/element.dtd 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 4 5 6 7 | <!--
CAUTION: Do not modify this file directly on it's code unless you know what you are doing.
Unexpected results may occur if the code is changed deliberately.
-->
<!ELEMENT element ((operator, opfamily?) | function | type)>
<!ATTLIST element type (operator | function | storage) "operator">
<!ATTLIST element stg-number CDATA #IMPLIED>
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