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> From: Metadata Object Description Schema List [mailto:[log in to unmask]] On
> Behalf Of Karen Coyle
> Sent: Friday, March 13, 2009 4:53 PM
> To: [log in to unmask]
> Subject: Re: [MODS] URL for the current version of mods
> 
> Andrew, it sounds like you are saying that there shouldn't be a generic
> URL... ? I believe that people asked for it in the past, but maybe it's
> not a good idea. It seems to work when updates are backward compatible
> but not when they aren't.

No I'm not saying that there should not be a generic URI to the MODS 
XML schema.  Having a generic URI is useful especially when you want to
link to the latest specification.  However, I was saying that:

1) The generic cannot be used in the xsi:schemaLocation attribute for
   MODS instance documents because the attribute uses a specific MODS
   namespace and the XML schema returned by the generic URI could be
   any MODS namespace.  There is a one-to-one relationship between a
   namespace and its schema.

2) The LC web site does not indicate that the MODS generic URI is a URI
   alias of the latest MODS XML schema and use appropriate HTTP status
   codes and headers to indicate that the generic URI is returning the
   representation of the latest MODS XML schema.

These two issue, I believe, led to the confusion of the original poster
asking whether they should or should not be using the generic URI in
the xsi:schemaLocation attribute in their MODS instance documents.


Andy.