For linking from one <ead> to another <ead>, use the <archref> element. It
has all of the external linking attributes and can contain all of the <did>
elements. If you want to link to a URL, give the URL as the system
identifier (preferably in a SGML catalog file). For example, the catalog
entry for the example below would be something like what follows (like
because a real URL would need the "..." replaced by the server and path
address where dukew.sgm resides:

PUBLIC "-//Duke University::Special Collections
Library//TEXT(US::NcD::::Washington Duke Papers)//EN"
"http:// ... /dukew.sgm"


At 04:39 PM 8/13/97 -0400, you wrote:
>Likewise, how about about linking from and ead document to another ead
>document or linking to a specific URL?
>Judging from the retrospective conversion guidelines
>( here's my thought:
><ENTITY dukew PUBLIC "-//Duke University::Special Collections
>Library//TEXT(US::NcD::::Washington Duke Papers)//EN" "dukew.sgm">
>See the <extref entityref="dukew">Washington Duke Papers</extref>
>The delivery mechanism (Panorama, Dynaweb, etc.) could then use this to
>link to the dukew.sgm file.
>It does seem that either extref or extptr could be used with the same
>effect.  Is one preferable over the other?
>Linking to a specific url seems more complicated - while would be nice to
>be able to do something like
>See <extref href="">Copyright
>but it seems to defeat the modularity of using an FPI - you'd have to
>change all your sgml files if the url ever changed.
>How have others gone about this?
>Stephen Miller
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