Costello, Roger L. a écrit :
> Hi Folks,
>
> I am trying to characterize the types of changes to schemas which
> enable backward and forward compatibility.
>
> [Definition] An old and new schema are backward and forward compatible
> with the other if each can validate XML instance documents that were
> written to the other schema. Thus, a new application can process XML
> instances from an old application, and an old application can process
> XML instances from a new application.
>
> Assertion: Relax NG supports backward and forward compatibility but XML
> Schemas does not.
>
hi Roger,
old schema :
(a|b)*
new schema :
(b|a)*
I'm almost sure that one can express these simple content models with
WXS and RNG :)
IMHO, changes to schemas which enable backward and forward compatibility
lead to 2 equivalent schemas (as they are validating the same instances)
--
Cordialement,
///
(. .)
--------ooO--(_)--Ooo--------
| Philippe Poulard |
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http://reflex.gforge.inria.fr/
Have the RefleX !
