[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: Nasty XPath expressions


kelvin yeow
On Thu, 13 Dec 2001, Kelvin Yeow wrote:

> I wonder what XPath expressions would cause an "XPath processor" to sweat?
> Any "XPath processor" developer out there?

Howdy, I'm Bob, one of the developers of Jaxen (http://jaxen.org/), a
'universal' XPath engine for Java.

The biggest issue we've had (it's Today's Big Issue) is regarding 
document-ordering when using a union expression.

	$foo/bar | $cheese/melty

XPath says that nodes should be returned in 'document order', which
becomes a non-trivial in the case of some expressions involving
the union operator.  One developer has a solution, but it is of
O(tree-size) complexity.  Do that against a 30mb document, and
suddenly XPath isn't nearly as attractive.

Long/complex xpaths, or xpaths involving '//' and such aren't really
that hairy.

	-bob


PURCHASE STYLUS STUDIO ONLINE TODAY!

Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
Email
First Name
Last Name
Company
Subscribe in XML format
RSS 2.0
Atom 0.3
 

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.


Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.