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[Xcore] The namespace prefix '...' is not well formed [message #1761426]

Wed, 10 May 2017 23:48

Nicolas Rouquette

Messages: 40
Registered: December 2014

Member

Consider the following xcore model:

package org.example.xmlSomething

This produces an Xcore Problem:

The namespace prefix 'xmlSomething' is not well formed

It seems that Xcore categorically disallows the last segment of the package namespace to begin with 'xml' (regardless of the case).

I notice that Xcore accept variants like the following:

x_...
xm_...
_xml...

It is very peculiar that the prefix 'xml' is not allowed.

Is this validation rule really necessary?

What kinds of problems is this validation rule intended to prevent?

- Nicolas.

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Re: [Xcore] The namespace prefix '...' is not well formed [message #1761435 is a reply to message #1761426]

Thu, 11 May 2017 06:52

Ed Merks

Messages: 33133
Registered: July 2009

Senior Member

Yes https://www.w3.org/TR/REC-xml-names/#xmlReserved reserves all prefixes that begin with "xml" and given the primary reason for defining the namespace prefix at all is for use as a prefix (xmlns:<namespacePrefix>) in an XML serialization, the restriction prevents invalid serializations.

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: [Xcore] The namespace prefix '...' is not well formed [message #1761726 is a reply to message #1761435]

Thu, 11 May 2017 14:36

Nicolas Rouquette

Messages: 40
Registered: December 2014

Member

Ah, of course! Thanks Ed for this clarification!

I suggested a couple of improvements here: https://bugs.eclipse.org/bugs/show_bug.cgi?id=516512

- Nicolas.

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Re: [Xcore] The namespace prefix '...' is not well formed [message #1761728 is a reply to message #1761435]

Thu, 11 May 2017 14:37

Nicolas Rouquette

Messages: 40
Registered: December 2014

Member

Ah, of course! Thanks Ed for this clarification!

I suggested a couple of improvements here: https://bugs.eclipse.org/bugs/show_bug.cgi?id=516512

- Nicolas.

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