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Hi Anne-Marie,

@authfilenumber does seem to be the appropriate place to insert a URI for a
controlled access term. I have recently adopted this approach for our
finding aids that link to our authority URIs (described in EAC-CPF). See
http://numismatics.org/archives/ark:/53695/nnan0028 /
http://numismatics.org/archives/ark:/53695/nnan0028.xml for example. The
@source attribute requires a NMTOKEN, but the list isn't restricted in the
schema. It could be anything, really, that conforms to that datatype (see
http://www.liquid-technologies.com/DTD/Datatypes/NMTOKENS.aspx for a
definition). We're using viaf, pleiades, geonames, aat, lcsh, etc.

In EAD 3, the @vocabularysource attribute is explicitly designated for
capturing URIs that define controlled access terms.

Ethan


On Tue, Jun 24, 2014 at 4:26 PM, Anne-Marie Viola <[log in to unmask]>
wrote:

> Here at the Image Collections and Fieldwork Archives (ICFA) at Dumbarton
> Oaks (http://www.doaks.org/library-archives/icfa) we are using the
> ICA-AtoM CMS (https://www.ica-atom.org) to produce EAD XML finding aids,
> which we plan to share with Harvard's union catalog for finding aids.
>
> In reviewing these export files, I just noted that our exports include the
> source note for each subject term in the @source attribute; our source
> notes are typically links (developed on the principles of linked, open
> data). It appears that this is problematic as the files aren't validating
> with HTML in that attribute. Would @authfilenumber be a better choice for
> these URL's, as it looks like they can accept CDATA? Does anyone know what
> the NMTOKEN values are for @source?
>
> Thank you,
> Anne-Marie H. Viola
> Metadata & Cataloguing Specialist,
> Image Collections and Fieldwork Archives (ICFA)
> Dumbarton Oaks Research Library and Collection
> 1703 32nd Street, NW Washington, DC 20007
> http://www.doaks.org/library-archives/icfa
> violaa[at]doaks.org
>