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List:       xom-interest
Subject:    Re: [XOM-interest] Syntax for PI "target" is supposed to permit
From:       "Leif Stainsby" <lstainsby () galdosinc ! com>
Date:       2010-05-04 0:04:49
Message-ID: 4E1D53230994FD45A119B5090DFBF460023436B8 () andalusia ! Galdos ! local
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Found the missing piece:  In "Namespaces in XML 1.0 (Third Edition)",
section 7, "Conformance of Documents":
  http://www.w3.org/TR/REC-xml-names/#Conformance

it indicates that PI targets must conform to the NCName production (when
namespaces are enabled) in order for the containing document to conform
to the Namespace spec.

Salut,

...Leif

-------------------------------------------------
When will the madness end....



> -----Original Message-----
> From: xom-interest-bounces@lists.ibiblio.org 
> [mailto:xom-interest-bounces@lists.ibiblio.org] On Behalf Of 
> Leif Stainsby
> Sent: Monday, May 03, 2010 4:10 PM
> To: xom-interest@lists.ibiblio.org
> Subject: [XOM-interest] Syntax for PI "target" is supposed to 
> permit colons?
> 
> Hi,
> 
> We wanted to qualify our application specific PI "targets" 
> with an XML-ish prefix like so:
>   <?app:some-pi pi-data?>
> where "app" is a prefix which is consistently used to refer 
> to our application. But it seems that some tools/libraries do 
> not like this.
> We initally encountered the problem on JDOM 1.0 (fed by 
> Xerces 2.9.0) and further investigation indicated what 
> appears to be an inconsistency between the XML 1.0 spec and 
> some commonly used XML tools, such as XOM.
> 
> It seems that a PI "target" is explicitly allowed to contain 
> a colon (":").
> 
> XML 1.0 (Fifth edition), see the NameStartChar production:
>   http://www.w3.org/TR/REC-xml/#NT-NameStartChar
> 
> and has since the beginning, XML 1.0 (First edition), see the NT-Name
> production:
>   http://www.w3.org/TR/1998/REC-xml-19980210#NT-Name
> 
> Yet XOM restricts a PI "target" to the NCName production, 
> thus expressly excluding our friend the colon (":").  See the 
> XOM JavaDoc for
> ProcessingInstructions:
>  
> http://www.xom.nu/apidocs/nu/xom/ProcessingInstruction.html#Pr
> ocessingIn
> struction%28java.lang.String,%20java.lang.String%29
> 
> <quote>
>   IllegalTargetException - if the target is not a 
> non-colonized name or is the string "xml" in any case </quote>
> 
> Has anyone else noticed this?  Is this a known issue that 
> everyone simply ignores?  
> 
> Regards,
> 
> ...Leif
> 
> 
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> XOM-interest@lists.ibiblio.org
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> 
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