XML trade off 1 - DTD vs XML Schema

[MURATA Makoto]

Paul Prescod <paul at prescod.net> wrote:

>Why bother sending any schema information *at all*? If the first system
>has the schema and the document, why doesn't it just validate before
>passing the information to the second system? If the second system,
>conversely, can only deal with information that adheres to certain
>rules, then why wouldn't it supply the schema itself. It knows what
>those rules are!

The current working draft of XSDL introduced "information set contribution";  
a *lot* of information in schemata is exposed to application programs.  Therefore, 
you need to use a schema-ware processor and download the schema.  Moreover, you 
need some new APIs which can capture "information set contribution".  Otherwise, 
you cannot really use XSDL.

Makoto
 
Fuji Xerox Information Systems
 
Tel: +81-44-812-7230   Fax: +81-44-812-7231
E-mail: murata at apsdc.ksp.fujixerox.co.jp

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