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Subject: Re: Special meeting to discuss NDR VER8 and VER9
A meeting was held 2005.04.08 to discuss the versioning problem. ATTENDANCE Jon Bosak Tony Coates Stephen Green Arofan Gregory Eduardo Gutentag Anne Hendry Sylvia Webb KEY FINDINGS - There is a real problem here that is independent of schema generation (i.e., it would exist even if the changes were made by hand) - The problem arises when changes are made simultaneously to two or more items sharing the same namespace - The suggestion to limit minor version changes to XSD extension doesn't solve the problem - If we can't figure out a way around this then we will have to abandon polymorphism within the limits of XSD as a goal PLAN An ad-hoc team composed of Arofan, Stephen, Tony, and David Kruppke will work over the next two weeks to analyze this problem in detail and recommend a solution. All other interested TC members are invited to participate. Key questions: - Is it possible to preserve polymorphism? - If so, how? - If not, what do we recommend instead? (The default is redeclaration of the whole set.) - In either case, what changes need to be made to the NDRs and the Customization Guidelines? The team will hold phone meetings from 18h00-20h00 Central European time (17h00-19h00 in the UK) on 4/12 (Tuesday), 4/15 (Friday), 4/18 (Monday), and 4/19 (Tuesday) using the usual UBL conference bridge. (Subcommittee chairs: please notify me ASAP if this conflicts with any of your scheduled calls and we will switch to an alternative number for these sessions.) Email will be used to exchange examples. To ensure the widest possible participation, mail on this subject will use the TC mailing list. All messages in this thread will begin with "[ver]" to distinguish them from other mail. Arofan will be copied on all such mail by including the address "ilg21@yahoo.com" on the cc line. Initial action: Arofan to review the examples posted earlier by Stephen at http://lists.oasis-open.org/archives/ubl-ssc/200503/zip00002.zip Jon
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