Subject: RE: Transformation: data to attr val. From: "Didier PH Martin" <martind@xxxxxxxxxxxxx> Date: Sun, 11 Jul 1999 15:58:12 -0400 |
Hi David, David said: Something was recently posted about this on the list. [dgm>] I recall seeing this post now but I did not understand it in context to my issue. My apologies. It is unfortunate that still much of the technical stuff I read on the list goes right by me. I am on the first plateau of the DSSSL learning curve. Much credit goes to the OpenJade site and especially the Markus Reinsch tutorial in getting me this far. However learning a little Scheme goes a long way. > `(("num" ,(data (current-node)))) [dgm>] This resulted in the same error message. I don't see what the comma is going to buy you. I'll go back and check the old post. > (list (list "num" (data (current-node)))) [dgm>] But this did the trick. Didier says: Don't apologize David, this is not so obvious if you are not used to scheme. Yes indeed the second construct is OK. I do not know for the first construct, I use the second one. I also use Tony's macro to create my own destination document elements. (define (make-element gi #!optional (children (empty-sosofo)) #!rest attributes) (make element gi: gi attributes: (let loop ((attr-list attributes) (result-list '())) (if (null? attr-list) result-list (let ((name (car attr-list)) (value (cadr attr-list))) (if (and (string? name) (string? value)) (append (list (list name value)) (loop (cddr attr-list) result-list)) (loop (cddr attr-list) result-list))))) children)) and use it like (declare-flow-object-macro target ((attribute1 #f) (attribute2 #f) #!contents children) (make-element "target" children "attribute1" attribute1 "attribute2" attribute2)) and use it like (element source (make target attribute1: "value1" attribute2: "value2" ) ) This way the target document'elements are perceived as flow objects. to transform from a doc type to an other one you just "make" the target elements. I can to write a bit about this powerful feature of OpenJade. I think that Tony wrote a Perl script that automatically creates the library from a template DTD or template target document. Tony, do I remember well? David, keep going. regards Didier PH Martin mailto:martind@xxxxxxxxxxxxx http://www.netfolder.com DSSSList info and archive: http://www.mulberrytech.com/dsssl/dssslist
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