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

Re: Nasty XPath expressions

xpath numerical expressions

> The spec spends (too much?) time
> discussing the ordering of returned sets, which depend upon the axis. 

No this is not the case, the sets are unorderd (but they are all subsets
set of an orderd set of nodes). (This is just like saying sets of
integers are unordered; {1,2,3} = {3,2,1} but you can, when required,
process the elements of the set in numerical order)

The axis used to select the set has no effect on the node set returned.

if an element has three children, then 

<xsl:variable name="a" select="*"/>
<xsl:variable name="b" select="*[1]|*[1]/following-sibling::*"/>
<xsl:variable name="c" select="*[last]/preceding-sibling::*|*[last()]"/>

all select the same node set even though the first two select them using
a forward axis, and the last one select using a reverse axis.

most xsl instructions will iterate over the nodes in a set in document
order, but that isn't really the same as saying the nodes in the set are
in that order.


This message has been checked for all known viruses by Star Internet
delivered through the MessageLabs Virus Scanning Service. For further
information visit http://www.star.net.uk/stats.asp or alternatively call
Star Internet for details on the Virus Scanning Service.


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.
First Name
Last Name
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.