RE: Datatype section, or Binary Large OBjects in Business Documen ts

["Hayes, Brian" <Brian.Hayes@Commerceone.com>]

I like this:
> Your DTD/Schema
> should specify the level of fault tolerence inherent in your business
> process.
It goes nicely with the concept that the documents are the interface to
electronic business services.  Thus, the document schema defines the
interface.  If the business process can initiate without an element, then
the element should be optional.

Of course, schemas are much better than DTDs at specifying the interface. 

Brian