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Re: Java package for XPath 1.0

• To: <michael.h.kay@n...>,"'Xml-Dev \(E-mail\)'" <xml-dev@l...>,"Alex Simov" <adis_78@d...>
• Subject: Re: Java package for XPath 1.0
• From: "Kiril Simov" <kivs@b...>
• Date: Mon, 21 Oct 2002 13:49:02 +0300
• References: <001201c2785e$846cffb0$6401a8c0@pcukmka>

Hi,

> > 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
more
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

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

• References:
  • RE: Java package for XPath 1.0
    • From: "Michael Kay" <michael.h.kay@n...>

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