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Home » Modeling » EMF » EMF Support for xsd:override
EMF Support for xsd:override [message #659984] Wed, 16 March 2011 13:46 Go to next message
Rob Mising name is currently offline Rob Mising nameFriend
Messages: 118
Registered: July 2010
Senior Member
Hi,

I was wondering if EMF supported xsd:override?

http://www.w3.org/TR/xmlschema11-1/#override-schema

I noticed that there was no support for xsd:redefine (which is now deprecated), and it made me wonder if override was supported?

Thanks

Rob


Re: EMF Support for xsd:override [message #660042 is a reply to message #659984] Wed, 16 March 2011 16:01 Go to previous messageGo to next message
Ed Merks is currently offline Ed MerksFriend
Messages: 30551
Registered: July 2009
Senior Member
Rob,

Oh my goodness, they replaced what was already an abomination with
something that looks as bad if not worse. No effort has gone into
supporting XML Schema 1.1 in the XSD model and without that preliminary
support, there's no possibility to map any of these things onto Ecore.
Can you imagine how you'd map this onto Java? I.e., replace some
existing class with a new one that's totally different. Good luck with
that...


Rob wrote:
> Hi,
>
> I was wondering if EMF supported xsd:override?
>
> http://www.w3.org/TR/xmlschema11-1/#override-schema
>
> I noticed that there was no support for xsd:redefine (which is now
> deprecated), and it made me wonder if override was supported?
>
> Thanks
>
> Rob
>
>
>
Re: EMF Support for xsd:override [message #660045 is a reply to message #659984] Wed, 16 March 2011 16:27 Go to previous messageGo to next message
Rob Mising name is currently offline Rob Mising nameFriend
Messages: 118
Registered: July 2010
Senior Member
Thanks Ed, I assumed that would be the case - I have no idea why it would be something people would really want to do.
Re: EMF Support for xsd:override [message #660048 is a reply to message #660045] Wed, 16 March 2011 16:40 Go to previous message
Ed Merks is currently offline Ed MerksFriend
Messages: 30551
Registered: July 2009
Senior Member
Rob,

I guess some people really like the idea of macro substitution. You can
imagine it might be easier to maintain different (incompatible) versions
of some schema, but the impact on tooling is extreme. How does a person
manage a conceptual schema that's so different from the concrete one
they can actually see? Oh well, I know from experience that committee
design involves brilliant people designing amazing things that are often
beyond the grasp of the common person intended to use it.


Rob wrote:
> Thanks Ed, I assumed that would be the case - I have no idea why it
> would be something people would really want to do.
>
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