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It is worth pointing that the <controlaccess> elements, <subject>, <corpname> and so on have @authfilenumber. Thus the <subject> below might look like the following: <subject encodinganalog="650" source="lcsh" authfilenumber="4668731">Botany, Agricultural.</subject> At 11:12 AM 11/28/2007, you wrote: >I echo Joseph's recommendations. Use of a native XML database, or >at least something that can process XQuery (and XUpdate), is >helpful, especially if the SMU catalog has the ability to expose >authority records as XML. The Perl recommendation is a good one >too, with Tie::File and maybe even MARC::Record to allow you to work >with formatting your subject strings to be injected into the EAD. > >Say you have a heading of "Botany, Agricultural", which gets updated >to "Botany, Economic" within the subject authority. The subject >authority has a hypothetical 001 identifier value in the catalog of >'4668731'. And let's suppose you run an update to check for >outdated values for your EADs. > >Your initial EAD instance could look like this: > ><controlaccess> > <head>Dynamic subject headings</head> > <subject encodinganalog="650" source="lcsh">Botany, Agricultural. > <extptr > xlink:href="http://library.smu.edu/authorities/4668731"/> > </subject> ></controlaccess> > >The value of the xlink:href attribute in the EAD extptr element >could serve as the "hook" for your programs to know which record >contains the updated heading. After running a XQuery that gets the >XML serialization of authority record 4668731 (and/or Perl if your >records aren't XML capable), you can update the text node of the >subject element by grabbing the 150 field's text value, formatting >it to your pre-coordination needs (if any), and outputting it into >your EAD's existing controlaccess/subject structure. > >The result would look like this: > ><controlaccess> > <head>Dynamic subject headings</head> > <subject encodinganalog="650" source="lcsh">Botany, Economic. > <extptr > xlink:href="http://library.smu.edu/authorities/4668731"/> > </subject> ></controlaccess> > >If your authority records can be serialized as XML, you could >alternatively use the "xpointer" attribute on extptr, although few >tools properly support XPointer these days. The same effect can be >achieved with XQuery. > >Hope this helps, >Clay > >~~~~~~~~~~~~~~~~~~ >Clay Redding >Digital Project Coordinator >Network Development & MARC Standards Office >Library of Congress >LA308, Mail Stop 4402 >101 Independence Ave. SE >Washington, DC 20540 >[log in to unmask] >202-707-7196 >~~~~~~~~~~~~~~~~~~ > >>> joseph greene <[log in to unmask]> 11/27/07 4:20 AM >>> >If it's a once off, you might try a simple Perl script with regular >expressions; the tie::file module is quite useful there. You might also >try an XML database, such as eXist for a medium-term solution. > >Joseph Greene >Irish Virtual Research Library and Archive Project (HII), >James Joyce Library, >UCD, >Belfield, >Dublin 4. > >(t) 01 716 7506 >(e) [log in to unmask] >(w) www.ucd.ie/ivrla > >----- Original Message ----- >From: "Gosnell, Joan" <[log in to unmask]> >Date: Monday, November 26, 2007 10:50 pm >Subject: question about updating access terms >To: [log in to unmask] > > > From: Gosnell, Joan > > Sent: Monday, November 26, 2007 4:25 PM > > To: [log in to unmask] > > Subject: question about updating access terms > > > > > > > > I have a question about updating access terms (i.e. LCSH) in our > > > > EADs. We have a service that updates terms in our Library (Voyager) > > catalog, > > > > but we will need to do this manually in our online finding aids. > > > > > > > > How do other folks handle this? > > > > > > > > Joan Gosnell > > University Archivist > > DeGolyer Library > > Southern Methodist University > > P.O. Box 750396 > > Dallas, TX 75275-0396 > > 214-768-2261 > > http://www.smu.edu/cul/degolyer/archives/index.htm > > > > > > > > > > > > Daniel V. Pitti, Associate Director Institute for Advanced Technology in the Humanities 319 Alderman Library P.O. Box 400115 University of Virginia Charlottesville, Virginia 22904-4115 Phone: 434-924-6594 Fax: 434-982-2363