[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: XML processor behavior with unused NS declarations

• From: Richard Salz <rsalz@us.ibm.com>
• To: Jeff Greif <jgreif@alumni.princeton.edu>
• Date: Tue, 14 Jul 2009 13:39:26 -0400

> >>  <div xmlns:dc="http://purl.org/dc/elements/1.1/">
> >>     <h2 property="dc:title">The trouble with Bob</h2>
> >>     <h3 property="dc:creator">Alice</h3>
> >>     ...
> >>  </div>
> >>
> >> there's no danger of the processor dropping the 'xmlns:dc' 
declaration,
> >> correct?

> But note that the XML Canonicalization (used for preparing XML for
> crypotographic signatures and transmission to another party that wants
> to verify that the XML was not tampered with) will probably remove
> those namespace declarations.

Well, probably not.  XML Eclusive canonicalization (c14n) by itself would 
drop the declaration because it's not used in the <div> element. But the 
entity specifying the c14n, to be correct, would say to include the "dc" 
prefix -- in this case because the value of the property attribute is, 
apparently, a qname.

        /r$

--
STSM, DataPower CTO
WebSphere Appliance Architect
http://www.ibm.com/software/integration/datapower/

• References:
  • Re: XML processor behavior with unused NS declarations
    • From: Jeff Greif <jgreif@alumni.princeton.edu>