[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Backward and forward compatible schemas ... RelaxNG --> Y
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 | ----------------------------- http://reflex.gforge.inria.fr/ Have the RefleX !
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