[Name] Serialization [Values] serializeXML or serializeEXI [Default] serializeXML [Description] 
whether to do the normal XML serialization (http://www.w3.org/2010/xml-c14n2#serializeXML), or do an EXI serialization (http://www.w3.org/2010/xml-c14n2#serializeEXI) - which is useful if the original document to be canonicalized is already in EXI format.