Finally got the install to work with help from the documents on here.  When I try to generate a canonical schema using the SYSXML.GEN_QUERY_CANONICAL_SCHEMA procedure, i get the following error:
 *** Failure 7504 in UDF/XSP/UDM SYSXML.GEN_QUERY_CANONICAL_SCHEMA: SQLSTATE
  U0027: Failed to create a CLI connector.