OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index]
Re: [xml-dev] Rick Jelliffe quotable quote on the purpose of schemas

It's more like a classification thing. The structure determines the 
category or "family" - eg it's a car. The constraints determine the 
classification - it's a Toyota Camry which can come in these colours 
only etc .... The conforming instance defines the individual.

As a design technique it's invaluable.


Greg Alvord wrote:
> Rick Marshall Wrote: This is a long way of saying that I think trying to get
> one tool to do 2 fundamentally different things is always going to less than
> optimal.
> Perhaps the view that structure and constraints are two separate things
> comes from that fact that to tools we use treats them separately.
> At the semantic level structure defines relationships.  The constraints of
> the semantic definitions are not separate from the definitions but part of
> it. Constraints like "If the parent has this value in that property then
> there must be a child of this type" do not operate separately from the
> semantic definitions.  They are integral to the semantic definitions.
> Greg
> Optimal Blue
> _______________________________________________________________________
> 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/
> Or unsubscribe: xml-dev-unsubscribe@lists.xml.org
> subscribe: xml-dev-subscribe@lists.xml.org
> List archive: http://lists.xml.org/archives/xml-dev/
> List Guidelines: http://www.oasis-open.org/maillists/guidelines.php

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index]

News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 1993-2007 XML.org. This site is hosted by OASIS