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For a "hello world" type xml document:
<?xml version="1.0" encoding="UTF-8"?>
<!-- see http://www.w3.org/TR/REC-xml-names/ -->
<bk:book xmlns:bk="urn:loc.gov:books" xmlns:isbn="urn:ISBN:0-395-36341-6">
<bk:title>Cheaper by the Dozen</bk:title>
<isbn:number>1568491379</isbn:number>
</bk:book>
you can arbitrarily define urn's on the fly for custom purposes?
338
Uniform Resource Names (URNs) A Uniform Resource Name (URN) is a Uniform Resource Identifier (URI) that is assigned under the "urn" scheme and a particular URN namespace, with the intent that the URN will be either a persistent, location-independent resource identifier or in some cases an abstract designator that is ...
Each Magento module can contain XSD files for XML validation. Magento uses Uniform Resource Names (URNs) to reference XML schema declarations.
One of the primary motivations for defining an XML namespace is to avoid naming conflicts when using and re-using multiple vocabularies. XML Schema is used to create a vocabulary for an XML instance, and uses namespaces heavily.
XML Namespaces - The xmlns Attribute When using prefixes in XML, a namespace for the prefix must be defined. The namespace can be defined by an xmlns attribute in the start tag of an element. The namespace declaration has the following syntax. xmlns:prefix="URI".
In short, yes. You can make 'em up as you like.
99
I found this answer quite useful, and it led me to this article which seems to say that yes you can make them up as you like, and indeed you SHOULD, if you aren't going to place a document online for a given URL.
31
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