Abuild has various options that output or otherwise generate XML data. Among these are --dump-data, --dump-build-graph, and --dump-interfaces. XML data can be hard to read and cumbersome for people to operate on directly, but it is a very convenient input format for additional processing. See the misc/xslt directory in the abuild source or binary distribution for some example XSL-T scripts. There is a README.txt file in that directory which contains additional information.