code: public static String getJcrNamespaceForRDFNamespace(
              final String rdfNamespaceUri) {
          if (rdfNamespacesToJcrNamespaces.containsKey(rdfNamespaceUri)) {
              return rdfNamespacesToJcrNamespaces.get(rdfNamespaceUri);
          }
          return rdfNamespaceUri;
      }
docs: Convert a Fedora RDF Namespace into its JCR equivalent
  
  @param rdfNamespaceUri a namespace from an RDF document
  @return the JCR namespace, or the RDF namespace if no matching JCR
  namespace is found