NS_INIT_REFCNT();
RDFXMLDataSourceImpl::RDFXMLDataSourceImpl(void)    : mInner(nsnull),      mIsWritable(PR_TRUE),      mIsDirty(PR_FALSE),      mIsLoading(PR_FALSE),      mNameSpaces(nsnull),      mURLSpec(nsnull){    NS_INIT_REFCNT();}