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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Question for the XPath and DOM folks
 > Read Garland Foster's response if you still don't understand the question. By this, do you mean the response you forwarded to the list? Because his latest response (which i in turn responded to) seems to be in line with what I've been saying. OK, just in case, I'll gander over the earlier message: DO: "If it returns a nodeset containing one text node should be returned then where does it come from and what is the node's parent?" It comes from wherever the implementation makes it. I don't think there is any answer to this question outside implementation specifics. If by what is the node's parent, you mean what is the answer to "/foo/text()[1]/parent::*", then clearly the answer is the <foo/> element. DO: "In the DOM the <foo> element has 3 children; 2 text nodes and 1 CDATA node. Your suggestion implies that the XPath query creates a new DOM node." No it doesn't. As an example of another possibility, the XPath implementation could serialize the document into a special XPath-compliant object model. DOM needn't come into it. Again, though, no answer to this outside implemnetation specifics. DO: "Suppose we do create the new node. What happen when we query its parent? If the parent is <foo>, what happens when we ask it for its children do we get our original 3 or the newly created text node?" If by this question, you mean "what is the result of "/foo/text()[1]/parent::*/node()" Then the answer is a node set with one text node. I think I understand what you are getting at, but I am serious when I say you cannot expect "right" answers here. The question of how an implementation shoud interpret output from XPath, regardless of what its input might have been, is not covered by any spec. I don't think the DOM WG will have any universally satisfactory way to answer this question, either. If I were on the WG, I would suggest that an XPath query on a DOM node should be considered a potential mutation operation, and that the text nodes should be normalized in the process. But who am I? :-) -- Uche Ogbuji Fourthought, Inc. http://uche.ogbuji.net http://4Suite.org http://fourthought.com Track chair, XML/Web Services One Boston: http://www.xmlconference.com/ The many heads of XML modeling - http://adtmag.com/article.asp?id=6393 Will XML live up to its promise? - http://www-106.ibm.com/developerworks/xml/li brary/x-think11.html 
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