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Re: Error in DSAKeyValue DTD/Schema

From: Donald E. Eastlake 3rd <dee3@torque.pothole.com>
Date: Tue, 28 Aug 2001 23:37:32 -0400
Message-Id: <200108290337.XAA0000050460@torque.pothole.com>
To: reagle@w3.org
cc: XML Signature WG <w3c-ietf-xmldsig@w3.org>
Jospeh,

I agree that changing the order as you have done is the right thing.

Donald

From:  Joseph Reagle <reagle@w3.org>
Reply-To:  reagle@w3.org
Organization:  W3C
To:  XML Signature WG <w3c-ietf-xmldsig@w3.org>
Date:  Tue, 28 Aug 2001 12:43:00 -0400
Cc:  Donald Eastlake 3rd <dee3@torque.pothole.com>
Message-Id:  <20010828164301.538CF873BF@policy.w3.org>

>Merlin has pointed out that edits to DSAKeyValue's schema/DTD render existing 
>instances that use J invalid:
>
>> http://www.w3.org/2000/09/xmldsig#
>>
>>   DSAKeyValue == P, Q, G, Y, J?, (Seed, PgenCounter)?
>>
>> http://www.w3.org/TR/2001/PR-xmldsig-core-20010820/
>>
>>   DSAKeyValue == (P, Q)?, J?, G?, Y, (Seed, PgenCounter)?
>>
>> Neither backwards nor forward compatible.
>
>Of course, it's not likely anyone is using J, but its reordering is contrary 
>to our goal of being backwards compatible when using the same namespace. I 
>dug around in the archives and noted that in the original proposal to 
>DSAKeyValue Don stated that it should be compatible:
>  http://lists.w3.org/Archives/Public/w3c-ietf-xmldsig/2001AprJun/0244.html
>  "I have tried to be compatible with the existing material."
>But when J was re-included, it preceded G,Y instead of following them:
> http://lists.w3.org/Archives/Public/w3c-ietf-xmldsig/2001AprJun/0269.html
>
>The easy fix to this is to re-order J after the G,Y in the REC. The following 
>are now in the Editors' copy:
>
>http://www.w3.org/Signature/Drafts/xmldsig-core/ 
>$Revision: 1.113 $ on $Date: 2001/08/28 16:41:08 $ GMT
>
><element name="DSAKeyValue" type="ds:DSAKeyValueType"/>
><complexType name="DSAKeyValueType">
>  <sequence>
>    <sequence minOccurs="0">
>      <element name="P" type="ds:CryptoBinary"/>
>      <element name="Q" type="ds:CryptoBinary"/>
>    </sequence>
>    <element name="G" type="ds:CryptoBinary" minOccurs="0"/>
>    <element name="Y" type="ds:CryptoBinary"/>
>    <element name="J" type="ds:CryptoBinary" minOccurs="0"/>
>    <sequence minOccurs="0">
>      <element name="Seed" type="ds:CryptoBinary"/>
>      <element name="PgenCounter" type="ds:CryptoBinary"/>
>    </sequence>
>  </sequence>
></complexType>
>
>
><!ELEMENT DSAKeyValue (P, Q)?, G?, Y, J?, (Seed, PgenCounter)?) >
Received on Tuesday, 28 August 2001 23:39:10 UTC

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