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   Re: [xml-dev] Java package for XPath 1.0

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> > I would like to inform you that we have just released a
> > package for XPath (version 1.0). The implementation is based
> > on the XPath W3C Recommendation available at:
> > http://www.w3.org/TR/1999/REC-xpath-19991116
> >
> Could you give some clues as to what this package offers that other Java
> XPath implementations don't?

There are some differences and Alexander will write more about them in
a while.

Our goal is to make some of the basic packages of our system available to
people, because we already have some request to do this.

> There's actually been surprisingly little academic work on XSLT and
> XPath implementation, and what there has been has been largely the sort
> of "I can write one too" exercise which in my view does not count as
> real research and should certainly not be supported by taxpayers' money.

Usually the decision for implementing a new engine (XPath, XSLT or other)
comes after a painful experience with somebody's implementations. Even
not free packages don't support all of the necessary functionality.

BTW, I think there are some works about optimizations of XPath queries and
such staff done by academics.

> Given that there are quite a few open source implementations, I think
> quite a good one-year research project would be to compare and contrast
> them, analyzing which optimization features appear to make the most
> significant contribution. Resist the temptation to write
> yet-another-processor yourself, and you could really add value by
> analysing the strengths and weaknesses of the work done by others.

Good idea.

With best regards,


Kiril Simov
BulTreeBank Project
Linguistic Modelling Laboratory, CLPP,
Bulgarian Academy of Sciences
Acad. G.Bonchev St. 25A
1113 Sofia, Bulgaria
E-mail: kivs@bultreebank.org
Web: http://www.bultreebank.org/


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