The vocabulary contains some extra warning or information classes, extending the classes defined in the core RDFa vocabulary. These are:
rdfa:FileReferenceError:
Warning: the input file could not be accessed
rdfa:IncorrectProfileDefinition:
Warning: erronous definition in a profile
rdfa:IncorrectPrefixDefinition:
Warning: erronous prefix definition
rdfa:ProfileCachingError:
Warning: problem in accessing the profile cache directory or cache file
rdfa:IncorrectBlankNodeUsage:
Warning: blank node used as a predicate
rdfa:ProfileCachingInfo:
Info: information on the caching mechanism's progress (mainly a debugging help)