OPAC/Holdings TutorialOPAC/Holdings Tutorial
Rolande St-Gelais
DRA Information
Stockholm, August 10, 1999
August 10, 1999 2
What is OPAC/Holdings ?What is OPAC/Holdings ?
A proposed, unique, agreed-upon method to:– request– retrieve &– exchange
holdings and circulation information between implementations
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Ultimate GoalsUltimate Goals
INTEROPERABILITY
+
CONSISTENCY
(IC)
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BackgroundBackground
Started out in 1997 Original needs: – retrieve location and copy information– retrieve summary and detailed holdings– obtain related circulation info– obtain lending policies, reservation info
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Background (cont..)Background (cont..)
Issues:– Multiple implemented ways to request/retrieve
holdings• Bib records• 852/9xx fields• MARC holdings records• Version-1 OPAC, Unimarc, etc.
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Background (cont..)Background (cont..)
Issues:– Multiple data formats, different levels of details– Missing information from existing formats
(MFHL and OPAC-1)
Conclusion:– New OPAC/Holdings Schema using GRS-1
MFHL: MARC for Holdings and Locations
FOR MORE INFO...
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O/H ComponentsO/H Components
1) Form: O/H Retrieval Mechanism
2) Content: O/H Schema
3) Outcome: O/H Profile
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O/H Retrieval MechanismO/H Retrieval Mechanism
Specifies how to ask for and retrieve holdings from any system
Promotes one unique retrieval mechanism Makes use of GRS-1 and O/H Schema
See “The Copenhagen Proposal” at:
http://www.nlc-bnc.ca/iso/z3950/holds4.htm
FOR MORE INFO...
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O/H SchemaO/H Schema
Generic definition of a ‘holdings record’ Provides for record segmentation Provides for holdings data indirection Includes several holdings reporting levels Each level defines extent of information
required
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O/H Schema (cont.)O/H Schema (cont.)
Key Concepts
Site : Unique physical location within an institution
Copy : Copy of a bibliographic item
Bib unit : Distinct portion of a bib item
Phys.unit : Part of a bib unit
Piece : Circulating item
See “O/H Schema: Definitions & Examples (Draft 4)” at :
http://www.dra.com/resources/z3950/draz3950.html#ZIG
FOR MORE INFO...
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O/H Schema (cont.)O/H Schema (cont.)
DRA NLC-BNC FCLA LC
DanZIG Stowe Computing GEAC
Collaborators & Participants
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O/H ProfileO/H Profile
Working paper for implementors Defines behavior of origins and targets
implementing the ZIG OPAC/Holdings Retrieval Mechanism and Schema
To be completed
http://www.nlc-bnc.ca/iso/z3950/holds6.htm
FOR MORE INFO...
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Current O/H related workCurrent O/H related work
O/H Schema Draft-4 out for final review (July 99) Definition of an O/H tagset Proposed espec-q: Ability to filter holdings data
upon retrieval Holdings attribute set: Ability to search directly
on holdings data
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In Summary...In Summary...
Still work to do, but...
Interoperability & consistency will outweigh by far the cost of our efforts
We will have strong basis for growth (ILL, Circulation, Database Update, etc.)
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OPAC/Holdings TutorialOPAC/Holdings Tutorial
Q & A