RDF im-/export is realized using the Sesame RDF parsers. All common RDF serialization formats, i.e. RDF/XML, Turtle, N3, and N-Triple, are supported. Most RDF based applications support RDF/XML. However, note that RDF/XML imposes some restrictions on the models which can be serialized, since the URI of a predicate has to be serialized as a valid QName. In particular the local part of a QName has to be a valid LocalPart. For example, the triple
<my:subject> <my:predicate!> "object" .
cannot be serialized in RDF/XML since the last character in "predicate!" is a exclamation mark and thereby not a valid NCNameChar.