Subject: Re: node-property From: Richard Light <richard@xxxxxxxxxxxxxxxxx> Date: Mon, 28 Jul 1997 22:39:07 +0100 |
In message <33DCCEBF.EB6A72BF@xxxxxxxxxxxxxxxx>, Paul Prescod <papresco@xxxxxxxxxxxxxxxx> writes >I wanted to explore node-property a little, and had some good luck with >it, and some bad luck. I was successful in getting at the entities in a >document, but not the elements. It looks to me like this program should >print out the number of elements declared in an SGML document's DTD (is >that right?): > ><!doctype style-sheet PUBLIC "-//James Clark//DTD DSSSL Style >Sheet//EN"> >(root > (make simple-page-sequence > (make paragraph > (literal > (number->string > (node-list-length > (node-property "elements" (current-node)))))))) > >But it always prints out 0. Any ideas? As I read it, you are fighting a losing battle. DSSSL-O seems to be carefully constructed so that you cannot get at DTD information like element declarations. Although the '(root' construction rule gives you access to the sgml-document node, the commands you are then allowed to use limit you to element-type nodes within the document instance. For example, the rubric for '(process-children)' quite explicitly says: "When the current node is of class 'sgml-document', the value of the 'document-element' property is treated as being the children of the node." In other words, don't try getting at the prolog! Or am I wrong? (I would be delighted if I were!) Richard Light SGML and Museum Information Consultancy richard@xxxxxxxxxxxxxxxxx 3 Midfields Walk Burgess Hill West Sussex RH15 8JA U.K. tel. (44) 1444 232067 DSSSList info and archive: http://www.mulberrytech.com/dsssl/dssslist
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