Developing a complete XPath implementation is a non-trivial task, and you
might soon find the "overhead" is equal to or exceeds the overhead of using
Xalan's XPath implementation. Not to mention the task of implementing
XPath/XQuery 2.0 when it reaches recommendation status.
After all, it's not as if an implementation of XPath in Xerces-proper will
be free of overhead. However, the choice is certainly yours.
Dave
Don Mastrovito
<dmastrovito@marathontechnol To:
[EMAIL PROTECTED]
ogies.com> cc: (bcc: David N
Bertoni/CAM/Lotus)
Subject: RE: Xerces-C
XPath module
11/08/2001 10:38 AM
Please respond to
xerces-c-dev
I agree with Martin and Chris. I'd like to be able to do a simple XPath
query on a DOM tree. I grew used to having that ability with MSXML. Quite
frankly, it's hard to justify the added overhead of Xalan in this
situation.
Don
At 03:27 PM 11/8/2001 +0000, you wrote:
> > The Apache Xalan project already implements XPath, along with XSLT. Is
> there
> > an advantage to incorporating another, either into Xerces itself, or
into
> > another Apache project?
>
> The advantage is when you want to use XPath on a DOM tree without
>XSLT. We've been using this internally for a while and have found many
>handy uses for it. For example, we have a 'grep' like tool which takes an
>XPath expression and an XML document, and returns all the matched nodes.
> This implementation also conforms to the W3C's DOM3-XPath
>Specification Working Draft. It allows people to experiment with this
>spec. As well, it supports namespace nodes, which I believe Xalan doesn't
>support.
> The suggestion of it being used as a basis for XQuery is
>interesting. We have our own XML-based scripting language that uses this
>module, so I can see it being as a basis for XQuery.
> Our implementation is also bison/flex based, and so might be
>easier to develop and bug fix, if need be.
>
>
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