Subject: Re: [xsl] namespace From: "cutlass" <cutlass@xxxxxxxxxxx> Date: Tue, 24 Jul 2001 10:37:39 +0100 |
http://www.rpbourret.com/xml/NamespacesFAQ.htm#q1_1 and here is an excellant more concise overview cheers, jim fuller ----- Original Message ----- From: "cutlass" <cutlass@xxxxxxxxxxx> To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx> Cc: <arsal01@xxxxxxxxxxx> Sent: Tuesday, July 24, 2001 10:06 AM Subject: Re: [xsl] namespace > in their simplest incarnation namespaces allow mixing of xml vocabularies, > since XSLT is itself an xml vocabulary with its own namespace (xsl: is the > prefix > > here is an example with plain xml below; > > <aaa xmlns="http://test.org/test>" xmlns:testprefix = > "http://test.org/anothertest"> > > <testprefix:bbb></testprefix:bbb> > > </aaa> > > defines the base namespace ( ie; no prefix ) as http://test.org/test, the > xmlns:testprefix defines another namespace, so we have mixing, why is this > useful ? > > lets look at a more complicated cutdown xslt example ( u can see the whole > template at http://www.exslt.org/str/functions/replace/index.html) > > <?xml version="1.0"?> > <xsl:stylesheet version="1.0" > xmlns:xsl="http://www.w3.org/1999/XSL/Transform" > xmlns:str="http://exslt.org/strings" > xmlns:exsl="http://exslt.org/common" > extension-element-prefixes="str exsl"> > > <xsl:template name="/"> > > </xsl:template> > > </xsl:stylesheet> > > with this the namespace with the prefix xsl: is our XSLT namespace > the others are namespaces used with the exslt effort. > > namespaces are an efficient method for mixing vocabularies, ie i could > extract the value of elements with only a specific namespace. > > namespaces are also used for binding functionality, > > for example ( taken from http://www.dpawson.co.uk/xsl/sect4/N9723.html); > <?xml version="1.0" ?> > <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" > xmlns:j="http://icl.com/java.util.Random" > exclude-result-prefixes="j" > version="1.0"> > > <xsl:output method="html" indent="yes"/> > > <xsl:template match="/brands"> > > <html> > <head> > <title>Random</title> > </head> > <body> > <xsl:variable name="cars" select="count(car)"/> > There are <xsl:value-of select="$cars" /> car brands in the list.<br /> > <br /> > <xsl:variable name="R" select="j:new()" /> > <xsl:variable name="r" select="ceiling(count(car) * j:nextDouble($R))" /> > Selected car brand is: <xsl:value-of select="car[$r]" /> > </body> > </html> > </xsl:template> > </xsl:stylesheet> > > this namespace generates a random number by using, this isnt done by magic, > the parser ( in this case using a java function ) has to be able to get to > the java function. > > here is another example > (http://www.exslt.org/math/functions/asin/index.html) which illustrates this > function binding to microsoft javascript ( notice the xmlns:msxsl= > definition ). > > <?xml version='1.0'?> > <xsl:stylesheet version="1.0" > xmlns:xsl="http://www.w3.org/1999/XSL/Transform" > xmlns:msxsl="urn:schemas-microsoft-com:xslt" > xmlns:math="http://exslt.org/math" > extension-element-prefixes="math msxsl"> > > <msxsl:script language="JavaScript" implements-prefix="math"> > <![CDATA[ > function asin(arg){ return Math.asin(arg);} > ]]> > </msxsl:script> > > </xsl:stylesheet> > > > --------------------------------------------------------------- > > to answer your question there is no default namespace with xml, except those > that you define. > > here is the SOAP spec, you will notice that there are a few SOAP namespaces, > though if i had to give an answer here it is > xmlns:SOAP-ENV=http://schemas.xmlsoap.org/soap/envelope/ > > > http://www.w3.org/TR/SOAP/ > here is a soap FAQ > http://www.develop.com/soap/soapfaq.htm#28 > some illustrating links > http://www.zvon.org/xxl/NamespaceTutorial/Output/index.html > > http://www.dpawson.co.uk/xsl/sect2/N5536.html#d162e21 > > cheers, jim fuller > > > > ----- Original Message ----- > From: "Lodhi, arsalan" <arsal01@xxxxxxxxxxx> > To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx> > Cc: <arsal01@xxxxxxxxxxx> > Sent: Tuesday, July 24, 2001 6:12 AM > Subject: [xsl] namespace > > > > Hi, > > > > I've a very simple and basic question. What is actually a namespace that > we > > use in xml and soap - what is its role ? > > > > arsalan > > > > > > _________________________________________________________________ > > Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp > > > > > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > > > > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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