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Re: The purpose of a namespace URI is ...

  • From: David Carlisle <davidc@nag.co.uk>
  • To: "Costello, Roger L." <costello@mitre.org>
  • Date: Fri, 30 Nov 2012 15:51:13 +0000

Re:  The purpose of a namespace URI is ...
On 30/11/2012 15:06, Costello, Roger L. wrote:
> In the XPath and XQuery Functions and Operators document [1] it
> defines the error() function: the first argument is "code" which is
> an xs:QName value. An xs:QName, of course has two parts: a namespace
> part and a local part. The document says that the purpose of the
> namespace part is to indicate who -- a component, a subsystem, or an
> authority -- is responsible for the meaning of the local part (the
> "local part" is, of course, the markup -- the XML vocabulary):

The local part in that case is not referring to markup or an XML
vocabulary at all, it is just the identifier of an error, the identifier
is almost never used in XML markup.

In what way does the local name FOER0001 in the namespace
http://www.w3.org/2005/xqt-errors relate to markup or an XML vocabulary?

It is the error:

     FOAR0001, Division by zero.
     This error is raised whenever an attempt is made to divide by zero.

It might be raised when evaluating the XPath   "1 div 0" from java
where there is no XML to be seen.


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