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Re: output html as lower case?: msg#00030

java.enhydra.xmlc

Subject: Re: output html as lower case?


Just a little update.  I asked on the Jaxen-interest list about treating the HTML DOM in a case-insensitive manner.  The one response I got made it sound like it isn't supported currently, but there is at least one (ugly) workaround.

Given the following XPath _expression_ which would be valid for XHTML....

"/html/head/title"

would have to be modified to the following for HTML

"/HTML/HEAD/TITLE"

That is, unless one uses a nifty trick (some might call it a hack)

"/*[name()='html' or name()='HTML']/*[name()='head' or name()='HEAD']/*[name()='title' or name()='TITLE']"


I actually tested that with Jaxen and it works.  However, JXPath returns nothing.  Jaxen is much better about following the spec as far as I can tell and if we are moving to DOM4J in XMLC-3.0, we will get Jaxen support out-of-the-box, since that is what DOM4J's XPath implementation is based upon.

Anyway, I'll keep on the Jaxen guys to support the HTML DOM in a case-insensitive way.

Jake

At 11:24 AM 6/24/2003 -0500, you wrote:
At 08:33 AM 6/24/2003 -0700, you wrote:
Richard Kunze <kunze@xxxxxxxxx> writes:
> > but if the former, then this change would be very, very nice to have.
>
> Lets put it on the agenda for XMLC 3.0. A new DOM implementation is pretty
> much a given for XMLC 3.0 anyway, so we can just as well include case
> insensitive XPath support for HTML.

Guys, this will break tons of code and it will no longer be W3C HTML
compatiable DOM.  This is a either a bug or missing feature in
XPath, depending on your point of view...  Submit a patch to em, the logic
for checking for an HTML doc is easy:

    if (node.getDocument() instanceof org.w3c.dom.html.HTMLDocument) { 
        .....
    }

Agreed.  I'll ask the guys at Jaxen (used in DOM4j and elsewhere) and JXPath what their take on this issue is.  The XPath engine is probably where the case-sensitivity issues should be addressed rather than storing a non-standard DOM.

Jake

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