I might have spoken too soon, this doesn't seem to work: (module foo mzscheme <div class="Ih2E3d">   (require (planet "sxml.ss" ("lizorkin" "sxml.plt" 1 4))) (define test   (apply    string-append    (sxml:clean-feed     (stx:transform-dynamic      (sxml:add-parents       (sxml:document "<a style="color: rgb(102, 51, 102);" href="http://modis.ispras.ru/Lizorkin/XML/poem.xml" target="_blank"> http://modis.ispras.ru/Lizorkin/XML/poem.xml</a>"))      (stx:make-stx-stylesheet       (sxml:document        "<a style="color: rgb(102, 51, 102);" href="http://modis.ispras.ru/Lizorkin/XML/poem2html.xsl" target="_blank"> http://modis.ispras.ru/Lizorkin/XML/poem2html.xsl</a>"        '((xsl . "<a style="color: rgb(102, 51, 102);" href="http://www.w3.org/1999/XSL/Transform" target="_blank"> http://www.w3.org/1999/XSL/Transform</a>"))))))) ;originaly had a leading space " <a style="color: rgb(102, 51, 102);" href="http://www.w3.org/1999/XSL/Transform" target="_blank"> http://www.w3.org/1999/XSL/Transform</a>"   ) </div>(provide test)) (module foo-user mzscheme   (require (file "foo.ss"))   (display test)   ) <div class="gmail_quote">On Jan 13, 2008 5:41 PM, John Clements <<a href="mailto:clements@brinckerhoff.org"> clements@brinckerhoff.org</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d"> On Jan 12, 2008, at 8:20 PM, Eric Biunno wrote: > Hi, I'm a little confused. The following code works as expected: > > (require (planet "sxml.ss" ("lizorkin" "sxml.plt" 1 4))) > >   (define test >     (apply >  string-append >  (sxml:clean-feed >    (stx:transform-dynamic >      (sxml:add-parents >       (sxml:document "<a href="http://modis.ispras.ru/Lizorkin/XML/poem.xml" target="_blank"> http://modis.ispras.ru/Lizorkin/XML/poem.xml</a>")) >      (stx:make-stx-stylesheet >        (sxml:document >          "<a href="http://modis.ispras.ru/Lizorkin/XML/poem2html.xsl" target="_blank"> http://modis.ispras.ru/Lizorkin/XML/poem2html.xsl</a>" >          '((xsl . " <a href="http://www.w3.org/1999/XSL/Transform" target="_blank">http://www.w3.org/1999/XSL/Transform</a>"))))))) >    ) > > (test) > > But when I create a module with this code and then call (test) from > another file I get the following error: > .plt-scheme/planet/300/371/cache/lizorkin/sxml.plt/1/4/stx- > engine.ss::12970: reference to undefined identifier: sxpath </div>Something's not right, here. 1) The code you've supplied will not evaluate in the MzScheme language, because 'test' is bound to a string, and not to a procedure. 2) When I remove the parens around 'test', this code works fine and displays the expected string. 3) When I wrap it in a module and evaluate it, 'test' is again bound to the correct value. 4) When I require this module from another one and fetch the value of 'test', I again get the right value. Here's the module that I generated: (module foo mzscheme <div class="Ih2E3d">   (require (planet " sxml.ss" ("lizorkin" "sxml.plt" 1 4))) (define test   (apply    string-append    (sxml:clean-feed     (stx:transform-dynamic      (sxml:add-parents       (sxml:document " <a href="http://modis.ispras.ru/Lizorkin/XML/poem.xml" target="_blank">http://modis.ispras.ru/Lizorkin/XML/poem.xml</a>"))      (stx:make-stx-stylesheet       (sxml:document        "<a href="http://modis.ispras.ru/Lizorkin/XML/poem2html.xsl" target="_blank"> http://modis.ispras.ru/Lizorkin/XML/poem2html.xsl</a>"        '((xsl . " <a href="http://www.w3.org/1999/XSL/Transform" target="_blank">http://www.w3.org/1999/XSL/Transform</a>")))))))   ) </div>(provide test)) (module foo-user mzscheme   (require (file "foo.ss"))   (display test)   ) John Clements </blockquote></div>