With OLR it is possible to write software without using Oberon user interface.
Dieter Glötzel's MusicXML-to-PMX converter is the first software running on Linux command line and using OLR.
This is a i386 binary, running also on X64 Kernels if 32bit kernel emulation is available. At the time of this writing all distributions I know have this activated. If your does not have this activated, you can use "qemu-i386 xml2pmx in out".
Due to compiler incompatibilities, the source currently does not compile on MIPS and ARM. If you need MIPS and ARM version, please let me know.