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
<- Previous	Index	Next ->
Re: [xsl] namespace, Rafael 'Dido' Sevill	Thread	Re: [xsl] namespace, cutlass
Re: [xsl] automation server can't c, Elise D.	Date	Re: [xsl] namespace, cutlass
	Month
<-prev [Thread] next->	<-prev [Date] next->
Month Index \| List Home