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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Data versioning strategy: address semantic,relationship, a
 Fraser -- We have plans to publish the papers and on-site speaker materials (slides) for both the conference and the preconference symposium on the web, available to anyone who is interested. As for "on-line blog-fests or other ways of communicating and contributing to the debate" ... what do you suggest? This is a new event and we are open to new ideas. -- Tommie >Tommie, > >thanks for the pointer to this pre-conference symposium. Like many >others on this list I recognise the issues raised initally by Roger >and have direct experience of pretty much everything Greg is talking >about. Integration in my organisation is moving into the crucial 2nd >and 3rd iterations of business services and this of course is where >it is discovered whether you have a sound change >management/versioning strategy in place or not ( i.e.you find that >those delivery pressures for getting verion 1.0 over the line have >left this problem in the ' ... yeah we'll fix that later ..' pile). > >This has been a subject that I have periodically brought up in this >list and others and it is fair to say that there are a wide variety >of views that range from 'strict contractual compiance' to >'completely open and self describing' vocabularies. More often than >not (at least in my world) these have to some extent been about >moving the problem around rather than necessarily dealing with it. > >Anyway, I was wondering whether any papers or other materials from >the conference and particularly the pre-conference symposium you >mentioned will be made available to those of us who will not be able >to make the trip ?? and whether those of us who would love to come >to Canada at this time of the year, can nonetheless particpate in >any on-line blog-fests or other ways of communicating and >contributing to the debate ? > >Thanks > >Fraser. > > > > > >On 09/12/2007, B Tommie Usdin ><<mailto:btusdin@m...>btusdin@m...> wrote: > >Roger -- > >You may be interested in the one-day symposium on Versioning, to be >held the day the before Balisage: The Markup Conference. > >For information on the Versioning preconference see: > ><http://www.balisage.net/Versioning/index.html>http://www.balisage.net/Versioning/index.html >For information on Balisage, see: <http://www.balisage.net/> >http://www.balisage.net/ > >I expect participants to address the issues you have identified here, >among others. > >-- Tommie > > >At 3:55 PM -0500 12/7/07, Costello, Roger L. wrote: >>Hi Folks, >> >>Oftentimes when discussing a "versioning strategy" I focus on how to >>design schemas in a fashion to lessen the impact of changes. It occurs >>to me that this addresses only one aspect of the data versioning >>problem. Below I have attempted to identify other issues to be >>addressed in a data versioning strategy. I am interested in hearing >>your thoughts on this. >> >>EVOLVING DATA >> >>Suppose some data is regularly exchanged between machines: >> >>Machine 1 --> data --> Machine 2 >>Machine 1 <-- data <-- Machine 2 >> >>Periodically the data changes due to requirement changes, additional >>insights, or from innovation. >> >>A change results in a new "version" of the data. >> >> >>PROBLEM >> >>What are the categories of changes that may occur? What categories of >>changes must be dealt with by a data versioning strategy? >> >> >>CATEGORIES OF CHANGE >> >>1. Semantic - the meaning of the data changes. >> >>Example: >> >>version 1 data: a "distance" value means the distance from the center >>of town. >> >>version 2 data: a distance value means the distance from the town line. >> >>2. Relationship - the relationship between the data changes. >> >>Example: >> >>version 1 data: there is a co-constraint between the start-time and the >>end-time. >> >>version 2 data: there is a three-way co-constraint between start-time, >>end-time, and mode-of-transportation. >> >>3. Syntax - the structure of the data changes. > > >>Example: >> >>version 1 data: the employee data is listed first and the person's name > >is given by his given-name and surname. >> >>version 2 data: the department data is listed first and in the employee >>data each person's name additionally contains a middle name. >> >> >>SUPPORTING TECHNOLOGIES >> >>Suppose the data being exchanged is formatted using the XML syntax. >> >>Machine 1 --> XML --> Machine 2 >>Machine 1 <-- XML <-- Machine 2 >> >>What technologies support the above categories of change? >> >>1. Semantic: A data dictionary may be used to define meaning. >> >>2. Relationship: Schematron may be used to express relationships >>between data. >> >>3. Syntax: XML Schema, Relax NG, or DTD may be used to express the >>structure of the data. >> >> >>REQUIREMENTS ON A VERSIONING STRATEGY >> >>A versioning strategy must take into consideration: >> >>- changes in the semantics of the data >>- changes in the relationships of the data >>- changes in the syntax of the data >> >>When data is in an XML format then a versioning strategy must >>implement: >> >>- versioning a data dictionary >>- versioning a Schematron schema >>- versioning an XML Schema, Relax NG schema, or DTD >> >> >>QUESTIONS >> >>a. Do you agree with the three categories of change? >> >>b. Do these categories represent all types of change? >> >>c. Do you agree that a versioning strategy must address semantic, >>relationship, and syntactic changes? >> >>/Roger >> >> >>_______________________________________________________________________ >> >>XML-DEV is a publicly archived, unmoderated list hosted by OASIS >>to support XML implementation and development. To minimize >>spam in the archives, you must subscribe before posting. >> >>[Un]Subscribe/change address: >><http://www.oasis-open.org/mlmanage/>http://www.oasis-open.org/mlmanage/ >>Or unsubscribe: <mailto:xml-dev-unsubscribe@l...> >>xml-dev-unsubscribe@l... >>subscribe: >><mailto:xml-dev-subscribe@l...>xml-dev-subscribe@l... >>List archive: >><http://lists.xml.org/archives/xml-dev/>http://lists.xml.org/archives/xml-dev/ >>List Guidelines: >><http://www.oasis-open.org/maillists/guidelines.php>http://www.oasis-open.org/maillists/guidelines.php > > >-- > >====================================================================== >B. Tommie >Usdin mailto:<mailto:btusdin@m...>btusdin@m... >Mulberry Technologies, >Inc. <http://www.mulberrytech.com>http://www.mulberrytech.com >17 West Jefferson Street Phone: 301/315-9631 >Suite 207 Direct Line: 301/315-9634 >Rockville, MD 20850 Fax: 301/315-8285 >---------------------------------------------------------------------- > Mulberry Technologies: A Consultancy Specializing in XML and SGML >====================================================================== > >_______________________________________________________________________ > >XML-DEV is a publicly archived, unmoderated list hosted by OASIS >to support XML implementation and development. To minimize >spam in the archives, you must subscribe before posting. > >[Un]Subscribe/change address: ><http://www.oasis-open.org/mlmanage/>http://www.oasis-open.org/mlmanage/ >Or unsubscribe: ><mailto:xml-dev-unsubscribe@l...>xml-dev-unsubscribe@l... >subscribe: ><mailto:xml-dev-subscribe@l...>xml-dev-subscribe@l... >List archive: ><http://lists.xml.org/archives/xml-dev/>http://lists.xml.org/archives/xml-dev/ >List Guidelines: ><http://www.oasis-open.org/maillists/guidelines.php>http://www.oasis-open.org/maillists/guidelines.php -- ====================================================================== B. Tommie Usdin mailto:btusdin@m... Mulberry Technologies, Inc. http://www.mulberrytech.com 17 West Jefferson Street Phone: 301/315-9631 Suite 207 Direct Line: 301/315-9634 Rockville, MD 20850 Fax: 301/315-8285 ---------------------------------------------------------------------- Mulberry Technologies: A Consultancy Specializing in XML and SGML ====================================================================== 
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