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- From: Paul Grosso <pgrosso@arbortext.com>
- To: xml-dev@xml.org
- Date: Fri, 11 Aug 2000 12:57:50 -0500
At 13:22 2000 08 11 -0400, Winchel 'Todd' Vincent, III wrote:
>More interesting information about Namespaces 1.0.
Not really. This is very old and well-trod ground, and there
is no ambiguity or error in the spec (in this area, at least).
Before starting a long thread on xml-dev, folks should check
out the public archive to which John Boyer posted and the
couple responses:
http://lists.w3.org/Archives/Public/xml-names-editor/2000Aug/
paul
>
>----- Original Message -----
>From: "John Boyer" <jboyer@PureEdge.com>
>To: "Donald E. Eastlake 3rd" <dee3@torque.pothole.com>; "Gregor Karlinger"
><gregor.karlinger@iaik.at>
>Cc: "XML" <w3c-ietf-xmldsig@w3.org>
>Sent: Friday, August 11, 2000 12:51 PM
>Subject: RE: Errors in the XML-Signature spec. examples (Namespace
>defaulting for attributes)
>
>
>> Hi Don and Gregor,
>>
>> Actually, there seems to be need for further consideration of Gregor's
>> point. I agree, Don, that the namespace spec seems to imply in Section
>5.2
>> that attributes inherit namespace qualification from their parent element,
>> but it does not come out and say it.
>>
>> Therefore, I kept reading and seem to have found a contradiction at the
>end
>> of Section 5.3. It gives an example of 'unique' attributes as follows
>>
>> <!-- http://www.w3.org is bound to n1 and is the default -->
>> <x xmlns:n1="http://www.w3.org"
>> xmlns="http://www.w3.org" >
>> <good a="1" b="2" />
>> <good a="1" n1:a="2" />
>> </x>
>>
>> The spec says that the attributes in the second occurence of <good> is OK
>> because default namespaces do not apply to attributes. So, even though
>> <good> is in the default namespace and hence has the qualifier
>> http://www.w3.org, this does not propagate down to qualify the attribute
>a.
>>
>> By extension, the attribute href you mentioned in the example of Section
>5.2
>> is not namespace qualified by the HTML URL.
>>
>> Yikes!
>>
>> I will be posting this problem to XML names to ask for clarification.
>>
>> John Boyer
>> Development Team Leader,
>> Distributed Processing and XML
>> PureEdge Solutions Inc.
>> Creating Binding E-Commerce
>> v: 250-479-8334, ext. 143 f: 250-479-3772
>> 1-888-517-2675 http://www.PureEdge.com <http://www.pureedge.com/>
>>
>>
>>
>> -----Original Message-----
>> From: w3c-ietf-xmldsig-request@w3.org
>> [mailto:w3c-ietf-xmldsig-request@w3.org]On Behalf Of Donald E. Eastlake
>> 3rd
>> Sent: Friday, August 11, 2000 5:15 AM
>> To: Gregor Karlinger
>> Cc: XML
>> Subject: Re: Errors in the XML-Signature spec. examples (Namespace
>> defaulting for attributes)
>>
>>
>>
>> Is this really a problem? I thought that attributes without namespace
>> prefixes were automatically considered within the context of the
>> element where they occur. In effect, the namespace qualified name of
>> the element is the default "namespace" for attributes of that element.
>>
>> Take the first exampe in section 5.2 of the Namespaces document which
>> you point to. It has an <a> element using the default namespace of
>> http://www.w3.org/TR/REC-html40. This element has an href attribute.
>> How are you supposed to understand what that attribute means unless
>> you consider it to, in some sense, be in the "namespace" of the
>> element where it occurs? I.E., that it is part of the "Per Element
>> Partition" defined in section A.2 of the Namespaces document.
>>
>> In your example below, just saying "Id" is, in effect, saying
>> "XMLSignature:Signature:Id" except that syntax is prohibited...
>>
>> Presumably this is the reason for the odd wording:
>> "Note that default namespaces do not apply directly to attributes."
>> --------
>>
>> Donald
>>
>> From: "Gregor Karlinger" <gregor.karlinger@iaik.at>
>> To: "XML" <w3c-ietf-xmldsig@w3.org>
>> Date: Fri, 11 Aug 2000 12:21:04 +0200
>> Message-ID: <NDBBIMACDKCOPBLEJCCDMEHNCJAA.gregor.karlinger@iaik.at>
>>
>> >Hi Joseph & Merlin,
>> >
>> >while trying to verify Merlins signature examples with our
>implementation,
>> >I detected the following problem, which applies to Merlins examples as
>> >well as to the examples in the XML-Signature specification in chapter 2.
>> >
>> >All the examples are constructed in the following way: A default
>namespace
>> >attribute is declared in the Signature element (see line [s01] in chapter
>> >2.1),
>> >which should apply to all descendants as well.
>> >
>> >The problem is, that a default namespace does not apply to descendant
>> >attributes, but only descendant elements
>> >(see http://www.w3.org/TR/REC-xml-names/#defaulting).
>> >
>> >I suggest to assign the XML-Signature namespace via a explicit namespace
>> >attribute (line [s01] could look like
>> >
>> > <XMLSignature:Signature
>> > XMLSignature:Id="MyFirstSignature"
>> > xmlns:XMLSignature="http://www.w3.org/2000/07/xmldsig#">
>> >
>> >Regards, Gregor
>> >---------------------------------------------------------------
>> >Gregor Karlinger
>> >mailto://gregor.karlinger@iaik.at
>> >http://www.iaik.at
>> >Phone +43 316 873 5541
>> >Institute for Applied Information Processing and Communications
>> >Austria
>> >---------------------------------------------------------------
>> >
>> >
>>
>
>
>
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