Re: I-D ACTION:draft-ietf-trade-voucher-lang-03.txt

[Donald Eastlake 3rd <dee3@torque.pothole.com>]

Hi,

I suggest that in the next version of this an ID attribute should be
added to voucher. To assure uniqueness, we might also recommend that the
ID value be the based64 of a hash of the Exclusive Canonicalization
<http://www.w3.org/TR/xml-exc-c14n> of the voucher element with the ID
attribute dropped out. That is, something like

Base64 ( SHA1 ( ExclusiveCanonicalization (
           XPath ( voucher,
	           ( //. |
                     //namespace::* |
                     /@[ localname() != Id ] |
                     /descendant::node()/@
                   ) )
)))

Thanks,
Donald
======================================================================
 Donald E. Eastlake 3rd                       dee3@torque.pothole.com
 155 Beaver Street              +1-508-634-2066(h) +1-508-851-8280(w)
 Milford, MA 01757 USA                   Donald.Eastlake@motorola.com

On Tue, 18 Jun 2002 Internet-Drafts@ietf.org wrote:

> Date: Tue, 18 Jun 2002 07:26:48 -0400
> From: Internet-Drafts@ietf.org
> To: IETF-Announce:  ;
> Cc: ietf-trade@lists.elistx.com
> Subject: I-D ACTION:draft-ietf-trade-voucher-lang-03.txt
>
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Internet Open Trading Protocol Working Group of the IETF.
>
> 	Title		: XML Voucher: Generic Voucher Language
> 	Author(s)	: K. Fujimura, M. Terada
> 	Filename	: draft-ietf-trade-voucher-lang-03.txt
> 	Pages		: 19
> 	Date		: 17-Jun-02
>
> This document specifies rules for defining voucher properties in XML
> syntax. A voucher is a logical entity that represents a right to
> claim goods or services. A voucher can be used to transfer a
> wide-range of electronic-values, including coupons, tickets, loyalty
> points, and gift certificates, which are often necessary to process
> in the course of payment and/or delivery transactions.
>
> A URL for this Internet-Draft is:
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