W06: Invalid UCD 'x': explanation 3 (16.67%)

URL Network Warnings Schema Expected votlint
http://wfaudata.roe.ac.uk/twomass-dsa/DirectCone?DSACAT=TWOMASS&DSATAB=twomass_psc&RA=218.8&DEC=-29.9&SR=0.1&VERB=3 - 6 1.1 - ?
http://wfaudata.roe.ac.uk/twomass-dsa/DirectCone?DSACAT=TWOMASS&DSATAB=twomass_xsc&RA=218.8&DEC=-29.9&SR=0.1&VERB=3 - 20 1.1 - ?
http://wfaudata.roe.ac.uk/sdssdr8-dsa/DirectCone?DSACAT=SDSS_DR8&DSATAB=SpecObjAll&RA=249.9&DEC=0.0&SR=0.01&VERB=3 - 22 1.1 - ?