/usr/lib/ocaml/pxp/META is in libpxp-ocaml-dev 1.2.4-1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | description = "Polymorphic XML Parser - Convenience Package"
version = "1.2.4"
requires = "pxp-engine pxp-lex-iso88591 pxp-lex-iso88592 pxp-lex-iso88593 pxp-lex-iso88594 pxp-lex-iso88595 pxp-lex-iso88596 pxp-lex-iso88597 pxp-lex-iso88598 pxp-lex-iso88599 pxp-lex-iso885910 pxp-lex-iso885913 pxp-lex-iso885914 pxp-lex-iso885915 pxp-lex-iso885916 pxp-ulex-utf8"
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