Getting the Wilbur RDF kit to run on ACL.

Hi,

  I am trying to get the Wilbur RDF toolkit
  <http://wilbur.sourceforge.net> to run on ACL.  I follow the
  installation process meticulously.  Then, when I try to load
  all of Wilbur's appropriate files (exactly in the same order as they
  are in wilbur.system) this suspicious error is displayed: 

;   Loading
;      /home/katz/dev/software/wilbur-1.tar.gz/core/core/source/xml-parser.lisp
Error: attempt to call `WHITESPACE-CHAR-P' which is an undefined
       function.
  [condition type: UNDEFINED-FUNCTION]

  I defined my own version of whitespace-char-p at the toplevel just
  to see if it would uncover more errors (although whitespace-char-p
  should clearly work since it's defined in xml-util.lisp, which is
  loaded correctly before xml-parser.lisp) and got:

;       Loading
;          /home/katz/dev/software/wilbur-1.tar.gz/core/core/source/rdf-data.lisp
Error: Attempt to take the value of the unbound variable `-RDF-URI-'.
  [condition type: UNBOUND-VARIABLE]

  Any ideas on what's causing this?  whitespace-char-p is actually
  defined in one of the loaded files, yet I still get this error.  Any
  Wilbur guys out there who know what's up?

Thanks a lot for your help,
-- 
Jordan Katz <[email protected]>  |  Mind the gap