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Re: [xsl] questions regd namespaces
Subject: Re: [xsl] questions regd namespaces From: subbu@xxxxxxxxxxxx Date: Tue, 09 Jul 2002 10:00:26 +0100 |
Thank you very much Jeni.. Quoting Jeni Tennison <jeni@xxxxxxxxxxxxxxxx>: > Hi Subbu, > > > 1. Is xmlns treated different from a normal attribute?? > > Yes. 'xmlns' attributes don't count as attributes as far as the XSLT > processor is concerned (either on input or output). The XSLT processor > automatically adds namespace declarations to the output that you > create based on the namespaces of and the namespace nodes on the > elements in the result tree. > > > 2. In my case how do i output the value of xmlns?? > > Well, the simplest way is to make sure that your all-centres element > in the result is in the namespace > 'http://www.nda-centres.com/namespaces'. The simplest way of doing > that is to include a namespace declaration on the literal result > element. For example: > > <xsl:template match="/"> > <all-centres xmlns="http://www.nda-centres.com/namespaces" /> > </xsl:template> > > But more usually you should declare the namespace on the > xsl:stylesheet element as the default namespace for the stylesheet: > > <xsl:stylesheet version="1.0" > xmlns:xsl="http://www.w3.org/1999/XSL/Transform" > xmlns="http://www.nda-centres.com/namespaces"> > > <xsl:template match="/"> > <all-centres /> > </xsl:template> > > </xsl:stylesheet> > > > 3. How will someone benifit from using a namespace declaration?? > > That's a hard question to answer. The namespace of an element is an > essential part of an element, so it's like asking "How will someone > benefit from naming an element?" They'll benefit because the element > will be recognised properly by applications that are built to process > elements in that namespace. The point of namespaces in general is to > enable you to have documents that mix elements from lots of different > markup languages without getting confused about what a particular > element means. > > > 4. In the xsl:stylesheet instruction, > > <xsl:stylesheet version="1.0" > xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> > > the above namespace allows some XSL functions where as the older > version > > <xsl:stylesheet xmlns:xsl="http://www.w3.org/TR/WD-xsl"> does not > allow some > > methods.. > > so where are these methods?? how does the processor know that the > perticular > > namespace doesnt contain the method or does contain the method??where > does it > > look for this information? > > The XSLT processor has the methods (I assume you mean functions and > elements) built into it. The XSLT processor knows which elements and > functions it needs to use based on the namespace URI, which is > hard-coded into the processor. The XSLT processor doesn't need to look > anywhere to find this information -- it is programmed in by the > implementer; the implementer found out what functions and elements > need to be supported by reading the spec. > > Cheers, > > Jeni > > --- > Jeni Tennison > http://www.jenitennison.com/ > > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > > -------------------------------------------------------------- Sent with "Me-Mail", Boltblue's FREE mobile messaging service. http://www.boltblue.com XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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