On Thu, 12 Jul 2001 01:15:09 +0200 (CEST), Erwin Bolwidt wrote:
>On Wed, 11 Jul 2001, Daniel Einspanjer wrote:
>
>>�I have been struggling with trying to get the XPath id() function to
>>�work in the application I am writting. �I have a DTD that defines an ID
>>�attribute and an xslt that performs some custom html translation.
>>�During runtime, I load the xml document using the
>>�org.apache.xerces.DOMParser, and the XPathAPI.selectNodeList() method to
>>�find the node I want. �Unfortunately, I am having to use the XPath
>>�"//element[@ID='" + eid + "']" instead of "id(" + eid + ")". �There are
>>�two problems with this. �First, it is slow on large documents, and
>>�second, I have to have a large if nest to keep trying different elements
>>�until I find the one that matches.
>>
>>�Has *anyone* done anything with DTD id attributes in Xalan? �Could
>>�someone spare a moment to give me a pointer or maybe even an example?
>
>I've included two small files in which the id() function is used in an xsl
>stylesheet, and it works.
>
>I run:
>java -jar ../../xalan-j_2_1_0/bin/xalan.jar -IN test.xml -XSL test1.xsl
>
>It was necessary to declare the attribute that serves as an id as type ID
>(see test.xml) If you did that, perhaps this attribute information is
>not passed (correctly) to xalan through the DOM tree for some reason.
>
>The id() function should look through the whole document in which the
>context node of the xpath expression appears. What do you pass to
>selectNodeList as the context node?
>
>Regards,
>�Erwin
>
I was not clear enough in my first e-mail. Part of my frustration with
all of this is that I found that the id() function worked fine in xsl
transformations, but I couldn't get it to work when using the DOM and
XPathAPI in my code to manipulate the xml file. For instance, to find
one element in the document (by its id) and do something with it.
For instance, in the xalan package, there is an example called
ApplyXPath. It takes an XPath statement as an expression. What I need
to be able to do is to be able to apply the id() function using ApplyXPath.
The XPathAPI has code to handle this function, but I can't make it return
anything. It will run without error, but the node in question is not found.
Thanks for the reply!
-- Daniel Einspanjer, [EMAIL PROTECTED] on 07/12/2001
