This topic has been discussed on the ZOO project IRC channel, but i would like to make an official request to discuss this in the trac system. :)

It would be very practical to use YAML config files instead of the current zcfg files for service description.

The current approach is partly too restrictive. YAML would be a huge benefit. To convert existing XML process descriptions into the YAML format, a python module is available: ​http://code.google.com/p/vtk-grass-bridge/source/browse/trunk/WPS/ZOO_Project/GrassXMLtoYAML.py

To run the script python YAML [1] and PyXB [2] must be installed. This script has been tested with GIS GRASS generated XML WPS process description files only.

[1] ​http://pyyaml.org/

[2] ​http://pyxb.sourceforge.net/