[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: What is the advantage of RELAX in comparison to Schemas?
On Tue, 30 Jan 2001, Bullard, Claude L (Len) wrote: > Keeping up multiple documents to control a single instance is a > cost, no doubt, but spreading a single ineffective control across > multiple processes with different objectives is also costly. > Again, the case must be made for consensus and that is harder than > to rule by fiat. The problem is that when one attempts the monolith > it is likely that acceptance and implementation may be sparser than > if only the simplest and easily recognized agreements are made (this > is Berners-Lee minimal victory approach). We are largely in agreement, it seems to me. You recognize that in some cases (our project would be an example, we believe) the "monolithic" approach is most appropriate. I agree that for other projects layering of constraint specifications is called for. Unfortunately, even for those cases, if W3C's schema mechanism is adopted for the core agreement, the boundaries between the layers are driven not by the requirements of the project (it may well be that "element E can only contain children C when E is part of parent P" is one of the core components universally agreed upon for a given document type), nor by distinctions between simplicity and complexity (it would be amusing to see an attempt to demonstrate that W3C's schema spec supports only "simple" constraints), but by the decision to omit support for the common requirement of context-aware content models. -- Bob Kline mailto:bkline@r... http://www.rksystems.com
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