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I'm still working on getting links to HTML documents from EAD.  I've
followed Daniel Pitti's advice and looked at his EAD Retrospective
Conversion Guidelines (http://sunsite.berkeley.edu/amher/upguide.html;
thanks Stephen).  I'm not sure what I'm doing wrong, but the EAD document
doesn't create a link from the text to the HTML document.  This is what
I'm doing:
[(...text snipped...)
<!NOTATION html PUBLIC "-//IETF//DTD HTML/EN">
<!ENTITY accessuse PUBLIC "-//(..text snipped...)//TEXT
(URL of HTML document)//EN" NDATA HTML>
]
(...text snipped...)
... see <extref displaytype="present" entityref="accessuse"> Policy on
Access and Use</extref>.

When Panorama loads the SGML document, before the words "Policy on Access
and Use" there appears a box with the NOTATION and ENTITY declarations in
it (this box is similar to the box that I saw when I discovered that
PanoramaFree 1.0 doesn't read JPEG images). The text "Policy on Access and
Use" is the text that I want to link from to the URL of the HTML document.

The Coversion Guidelines seem rather vague about external pointers.  The
section on the <dao> element was clear to me, but the rest of the
information feels more like a lesson on how to tag using the given
elements.  (The information on the <ref> element is clearer, but appears
to belong in the internal pointers section.)

The Panorama manual talks about linking to URLs, using <?ATTLINK tagname
attname URI> elements (this causes Panorama to treat the value of
attribute "attname" of the element "tagname" as a URL), but this doesn't
work much better.  I attempted to go this way before, but it lead to a
deadend where it brought up part of the text from the HTML document within
the SGML browser.

Has anyone linked to HTML documents from within the EAD?  If so, please
let me know where I can look at an example.  LC's "Visual Materials of the
NAACP" implies a future link to the Prints and Photographs home page, but
the link is still under construction.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Scott A. Leonard  ><>
e-mail:  [log in to unmask]
Scott's Page on the Web:  http://www.wam.umd.edu/~sleonard/

    "I cannot speak for the way God deals with others; I know only how He deals
with me personally."
                                C. S. Lewis,  _God in the Dock_ (p. 262)