I've uploaded RexXMLib to OS4Depot. RexXMLib is a procedure library that allows you to write XML files using ARexx. Three example scripts are included showing how to use library functions.
The library has 7 basic functions for creating XML files:
The rest 9 functions, PObjects schema functions, are just for making it easy to create PObjects files.
I can add other XML schema functions (for bookmarks, music playlist, etc. XML schemas) if they are needed.