RdfLexicon.java contains reference to certain non-existent properties (e.g. ldp:pageOf or ldp:firstPage). These do not appear in the LDP ontology, nor are they used in the fcrepo code. These and other such properties should be examined for possible exclusion from this file. For instance, fedora:hasChild appears not to be used anywhere except in test code.
Also, the JCR- and MODE-related namespaces and properties should be removed. If they are needed in other portions of the code base, they should be added to the fcrepo-kernel-modeshape module.