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

Re: XPath variables - immutable or not?


xpath variable

At least in Jaxen, we view variables as, well, variable. 

Users use them to create sort of 'prepared-statements' that can
be parameterized upon evaluation.

We allow a user to swap out the VariableContext (the name->value
lookup index) between evaluations.  But, we might be taking a
liberal view, because we also allow users to swap out the
FunctionContext and NamespaceContext at will.

	-bob


On Wed, 13 Nov 2002 AndrewWatt2000@a... wrote:

> I love the way that W3C specifications can sometimes throw up disconnected 
> questions.
> 
> In the XForms 1.0 CR the phrase, "XPath variables that change in value from 
> one recalculate to the next ..." started me thinking about just what I think 
> I know about "XPath variables".
> 
> Tacitly, I think I had assumed that "XPath variables" are immutable, possibly 
> because  I typically meet variables in connection with XPath expressions in 
> the context of XSLT 1.0.
> 
> A quick look through XPath 1.0 REC and XPath 2.0 WD revealed remarkably 
> little information about "XPath variables". I certainly couldn't find 
> anything to confirm my earlier tacit assumption that they are immutable.
> 
> In fact, I am even beginning to wonder if XPath variables actually exist. 
> .... Not, of course, that that is a question of life or death! :)
> 
> Andrew Watt
> 
> 
> -----------------------------------------------------------------
> The xml-dev list is sponsored by XML.org <http://www.xml.org>, an
> initiative of OASIS <http://www.oasis-open.org>
> 
> The list archives are at http://lists.xml.org/archives/xml-dev/
> 
> To subscribe or unsubscribe from this list use the subscription
> manager: <http://lists.xml.org/ob/adm.pl>
> 

--
Bob McWhirter        bob@w...
The Werken Company   http://werken.com/


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.