The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur
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The CERN Document Server
Link Manager

David McGlashan & Jean-Yves Le Meur

CERN, AS/DH, Library Support

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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

Outline of talk...

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Introduction:
       The CERN Library & URLs.
Link Management:
        The "Problem" & some solutions.
The Mighty Setlink:
       Weblib, Demonstration. & Features.
Technical Stuff:
       The Program, Speed, Recipes, HTML & Housekeeping.
talk monkey 		 
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

The CERN Library and Document Server

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blankness Book Monkey Vast repository of meta-data ...
  Preprints & Reports (> 255 000)
  Books & Pamphlets (> 43 000)
  Periodicals & Journals (> 1140)
  Administration documents (> 9000)
 ... always growing ...
... and of data ...
  Electronic versions of fulltext documents (PS, PDF).
  Paper versions are scanned and made available as TIFF.
  Eprints, Scientific Committee papers, Academic trainings, Photos,
   Press cuttings, etc.
  ~60,000 files is around 40 gigabytes.
 
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

URLs in the CERN Library Database (I):
Two types

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Stored URLs
  Special fields (EXT, ICO).
  "Controlled" URLs: to the Document Server or to CERN sites.
   "Uncontrolled" URLs: to documents or pages outside CERN.
Derived URLs
  URLs created on-the fly from another field.
  From the report number to the fulltext or the references.
  From the publication reference to the e-journal.
  From the conference code to the conference papers.
 
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

URLs in the CERN Library Database (II):
Validity

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Stored URLs: easy to check, hard to maintain.
  Programme "URL Checker" loops to check addresses.
  Manual deletion or correction.
  Last run (on books): 50% wrong.
Derived URLs: easy to maintain, hard to check!
  Changes discovered by chance (eg: new e-journals, dead e-journals).
  One maintenance action only (eg: remove the e-journal name in the list
  of CERN e-jounals on-line).
No solution?
 
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

The general "U-N-F" (URL Not Found) problem...

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stool monkey
 
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

Global future solutions

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URLs, URIs and URNs
  URL: physical name for the file location.
  URI: logical name for the file, and some more options.
  URN: generic name for many possible physical locations.
    (eg: /ch/cern/documents/scan/snowproof.html)
  Domain name servers will handle URNs to derive URLs.
Meanwhile... Link managers
  Links to files, replaced by links to a resolution service program.
  PURL: Permanent URL system (by OCLC) for serving HTML pages.
  Setlink: The CERN development for serving fulltext documents.
 
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

The Setlink solution...

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From some parameters to the end-user web-page.
  The Link Manager is able to tell what file it is looking for.
  It performs a search, and returns the related file(s).
You can offer services related to the file:
  File Format Conversions.
  Keyword searches.
  Email and printing facilities.
  Links to related pages & web-sites.
Convenient to use and maintain...
  ...if the system is well designed.
 
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

Before Setlink...Weblib...

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What is Weblib?
  A web-based interface to the CERN Document Server.
  A search engine for the library catalogues.
  A very powerful, customisable interface to the Library.
 
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

Structure of Weblib & CDS...

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a quick diagram
 
  
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

Demonstration...

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Weblib & Setlink
  http://weblib.cern.ch/
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

Recap...

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The user searches for a document using Weblib.
Access to the fulltext is provided by Setlink.
Conversions & other services are provided.
 
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

The Weblib Search...

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User searches the Bibliographic database.
A series of records are returned.
Database records are classified by three parameters;
  BASE - The "type" of the document, eg Preprint, Photograph...
  CATEG - A category within the base.
  ID - A unique identifier or filename.
These three parameters are then passed on to Setlink.
 
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The Mighty Setlink CERN AS/DH Library Support - 18th August 1999 D. McGlashan, J.-Y. Le Meur

From Parameters to file...

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Setlink is called with the three parameters.
  They are included in the URL just like HTML GET method.
  It is possible to bookmark the URL.     http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-lat&id=9612008
Setlink looks up the BASE and CATEG in a recipe file.
  It works out where the files should be stored on CDS.
  It goes to look for them.
It writes a web-page to the browser with the search result.
 
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