According to DSP0200, GC and EC requests accept an optional parameter, LocalOnly:
"If the LocalOnly input parameter is true, any CIM elements (properties, methods, and qualifiers), except those added or overridden in the class as specified in the classname input parameter, shall not be included in the returned class. If it is false, no additional filtering is defined."
Currently cimXmlParser parses the parameter, but it is ignored by the ClassProvider.
This appears to be a duplicate of https://sourceforge.net/p/sblim/sfcb-tix/20/.