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I cannot ascertain that this ever posted, apologies if it posts twice.

----- Original Message ----- 
From: "Ray Denenberg, Library of Congress" <[log in to unmask]>
To: "Mets list" <[log in to unmask]>
Cc: <[log in to unmask]>
Sent: Wednesday, May 17, 2006 10:40 AM
Subject: xlink schema


> (Note: this is addressed to METS with cc to MODS.)
>
> A copy of the xlink schema is now at
http://www.loc.gov/standards/xlink.xsd
>
> It is identical to those at:
> http://www.loc.gov/standards/mods/xlink.xsd  and
> http://www.loc.gov/standards/mets/xlink.xsd,
> which are now identical to one another.
>
> MODS will reference the new copy in its next version (3.2 - coming soon).
>
> We recommend that METS also reference this new copy in its next version
> (whenever).
>
> This addresses a problem raised recently; when using the METS and MODS
> schemas together there is a namespace conflict (same namespace, xlink, but
> schema in two different places, won't validate).
>
> (This problem remained unsolved for a few years because METS and MODS
could
> not reconcile different philosophies about the xlink namespace.  But I now
> notice that the two schemas are identical, I'm not sure when the METS
xlink
> schema was changed, but apparently the philosophies are reconciled.)
>
> Instead of asking METS to reference xlink from the MODS directory, or
asking
> MODS to reference xlink from the METS directory, we have put a copy in a
> "neutral" directory and recommend that xlink be referenced from that
> directory. The existing METS and MODS xlink schema copies will remain
where
> they are, so that older MODS and METS instances won't be affected.
>
> --Ray Denenberg
>