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Re: Property role and domain (was: Playing with XML Schema & XSLT)

  • From: "KenNorth" <KenNorth@e...>
  • To: <xml-dev@x...>
  • Date: Mon, 10 Jul 2000 11:15:33 -0700

role of child domain
> This argues for something like the "role"
> attribute, although you could do it some other way, like a "role" child
> element.

Interesting. Terry Halpin's semantic modeling technique (Object Role
Modeling) is based on objects playing roles:

"In ORM, objects play roles within a domain and participate in facts. An
object's arity expresses the number of roles it plays, so a unary fact is an
object playing a single role. A binary fact plays two roles, ..."

That was from a September 1994 article, when tools had transformations for
database schemas. By next year, we'll probably see XML schemas.








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