Re: The Browser Wars are Dead! Long Live the Browser Wars!
Paul: Yes, almost every data format/store can be abstracted as an XML view. The question that is yet-to-be-answered is whether these XML views will be as operationally efficient as SQL based views. Historically, client-side/persistence-independent view solutions are good enough when the data set is small enough and concurrency requirements are minimal. Once performance becomes a major issue, the 'view' becomes materialized or gets tied to the storage format, once performance becomes a major issue. It remains to be seen whether there will be an 'XML view' technology which is efficient without tying itself to a certain storage format. regards, Anupam Singh >From: Paul Prescod <paul@p...> >To: Dare Obasanjo <dareo@m...>, xml-dev <xml-dev@l...> >Subject: Re: The Browser Wars are Dead! Long Live the Browser >Wars! >Date: Mon, 21 Oct 2002 16:45:51 -0700 >MIME-Version: 1.0 >Received: from mail.oasis-open.org ([18.104.22.168]) by >mc4-f7.law16.hotmail.com with Microsoft SMTPSVC(5.0.2195.5600); Mon, 21 Oct >2002 16:46:05 -0700 >Received: (qmail 24505 invoked by uid 60909); 21 Oct 2002 23:55:21 -0000 >Received: (qmail 24497 invoked by uid 0); 21 Oct 2002 23:55:20 -0000 >Mailing-List: contact xml-dev-help@l...; run by ezmlm >Precedence: bulk >X-No-Archive: yes >List-Post: <mailto:xml-dev@l...> >List-Help: <mailto:xml-dev-help@l...> >List-Unsubscribe: <mailto:xml-dev-unsubscribe@l...> >List-Subscribe: <mailto:xml-dev-subscribe@l...> >Delivered-To: mailing list xml-dev@l... >Message-ID: <3DB491AF.3040809@p...> >User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-US; rv:1.1) >Gecko/20020826 >X-Accept-Language: en-us, en >References: ><B885BEDCB3664E4AB1C72F1D85CB29F8040EF684@R...> >X-Filtered-By: PerlMx makes it fast and easy. See >http://www.ActiveState.com/Products/PerlMx/Header >Return-Path: xml-dev-return-16084-avsingh=hotmail.com@l... >X-OriginalArrivalTime: 21 Oct 2002 23:46:05.0515 (UTC) >FILETIME=[0572B1B0:01C2795C] > >Dare Obasanjo wrote: >> ... >>This has little to do with the differences between relational and XML >>querying. All you've pointed out is that XML queries are typically done >>against a "view" while SQL queries are typically run against an actual >>database schema. A query against XML can be similarly tightly coupled if >>done against an XML repository (i.e. a native XML or XML-enabled DBMS) >>as can a SQL query be loosely coupled if performed against a SQL view. > >XML tools are typically designed with a "view" mindset. The XML document is >the interchange format of some data. There is almost always logic, whether >declarative or procedural, mapping to the persistence layer and the >toolkits are designed to help with that. I wouldn't really no how to go >about creating a SQL-queryable "view" in C as an abstraction over a variety >of SQL, OO and legacy data sources. Is there (for example) an open source >project or .NET component that would help me with that? Would I have to >become a deep magic expert at Postgres or SQL server versus spending a half >day with Expat? > >My understanding is that Microsoft has tried various experiments about the >"universal data view architecture" (ODBC, ADO, ec. etc.) and so-far, XML >has "won". In my experience, it is quite uncommon to create SQL views >outside of a SQL database, and very common (and easy) to create XML views >of all sorts of information. > > Paul Prescod > > >----------------------------------------------------------------- >The xml-dev list is sponsored by XML.org <http://www.xml.org>, an >initiative of OASIS <http://www.oasis-open.org> > >The list archives are at http://lists.xml.org/archives/xml-dev/ > >To subscribe or unsubscribe from this list use the subscription >manager: <http://lists.xml.org/ob/adm.pl> _________________________________________________________________ Internet access plans that fit your lifestyle -- join MSN. http://resourcecenter.msn.com/access/plans/default.asp
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