seismicportal.eu FDSN WADL files cannot be read

ObsPy cannot read the WADL files from www.seismicportal.eu.

See here:
http://lists.swapbytes.de/archives/obspy-users/2014-January/001188.html

The issue appears to be that the WADLs have documentation tags with no information in them. Currently the WADL parser assumes that if a doc tag is present it will also contain some information.