REQUEST/PIR/VDX AND THE WORLDCAT AVAILABILITY QUERY SERVICE
3 Feb 2011 saw; Last update 1 March 2011saw
WORLDCAT AVAILBILTY QUERY SERVICE OVERVI EW
The WorldCat Availability Query Service (AQ) works with PIR to provide holdings and availability information to
the Request service to identify possible UC lenders. This is parallel to the Holdings and availability information
current Melvyl supplies to the Request service. RSC-IAG asked to CDL to document this process. The information
is intended for use by ILL staff and interested public services staff.
The AQ service provides holdings and availability information for Requests generated from a record in Next
Generation Melvyl (NGM) and for requests generated from the special UC Order function in PubMed and
requests generated in UC-eLinks/Citation Linker. The document presents two scenarios:

Requesting an item from NGM

Requesting an item via UC-eLinks
Instructions on how to view the information passed to Request in the OpenURL from NGM or UC-eLinks are
included to aid in understanding why some bibliographic information may not be passed into VDX.
SCENARIO ONE: USER MAKES A REQUEST FROM NEXT GENERATION MELVYL (NGM)
User makes a request from an NGM record.
NGM (aka WorldCat Local) sends OpenURL v 1.0 containing the bibliographic data, including the OCLC
number for the record to Request, along with the UC campus identifiers indicating campus holdings in the
record.
The example used throughout this document is the item
AUTHOR:
KILEY, MICHAEL T.
TITLE:
HOW SHOULD UNEMPLOYMENT BENEFITS RESPOND TO THE BUSINESS CYCLE?
[ELECTRONIC RESOURCE] / MICHAEL T. KILEY.
PUBLISHER:
WASHINGTON, D.C. : FEDERAL RESERVE BOARD, [2003]
FORMAT:
BOOK; GOVERNMENT DOCUMENT; ONLINE
SERIES:
FINANCE AND ECONOMICS DISCUSSION SERIES ; 2003-01
REQUEST USER INTERFACE
Request parses the OpenURL into the component bibliographic fields for user review (see Appendix I); collects
enduser account information and passes this to PIR Authentication Service (PIRAuth.) This parallels the process
used in current Melvyl.
After PIRAuth validates the user, Request checks the SFX database for both CDL (systemwide licensed) and the
user’s home campus (from the Request form) licensed econtent to determine if an electronic copy of the item
may be available.
If SFX responds with the information indicating the item may be available electronically, then the user is offered
a link to the electronic version. If user chooses electronic version, the Request session ends, if user continues with
Request the Request is passed to PIR
REQUEST/PIR PROCESSING
The Request service PIR program queries the NGM AQ service for UC holdings using the OCLC number passed
in the OpenURL from NGM and UC the campus Identifiers
IF UC HOLDINGS ARE RETURNED
PIR goes through the standard routine of load balancing and creating a rota. The request is then sent to
VDX.
Note: AQ only returns holdings for the original OCLC number. Although there may be additional UC holdings
for the same item attached to a different OCLC number. These other UC holdings will not be attached. 1
IF NO UC HOLDINGS ARE RETURNED
PIR drops the OCLC number, and resends the query and AQ looks for a match using data from the
OpenURL, e.g., ISSN or ISBN, or title of whole item. (This is done in case the user began from a non-UC record
in order to look for UC holdings for the item.)
NGM AQ SERVICE PROCESSING FOR NGM ITEMS
STEP ONE: THE OCLC NUMBER PASSED TO REQUEST HAS UC HOLDINGS
All requests from NGM have OCLC numbers. Requests that do not originate in NGM (with the exception of
current Melvyl and some FirstSearch databases) do not have OCLC numbers, such as Scenario Two
If the OCLC number passed to Request does not have UC holdings attached, go to Step 2
If the OCLC number passed to Request has UC holdings attached, go to Step 4
1 This is often the reason an ILL Request comes in for an item held at the home campus. The home campus holdings are on a different OCLC record.
Request/PIR/VDX and the WorldCat Availability Query Service
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STEP TWO: THE OCLC NUMBER PASSED TO REQUEST HAS NO UC HOLDINGS USE ISxN
PIR drops the OCLC number and sends the ISSN or ISBN (ISxN) from the OpenURL (this is parallel to the steps
used for items from UC-eLinks) to look for a record with UC holdings. (
ISSN MATCHING
ISSN subfield rules follow UC-eLinks rules, i.e., matches are made only to the active ISSN e.g., 022 $a2, not
subfields containing incorrect (022 $y or canceled (022 $z) ISSNs. The fields used for matching are: 022$a;
440$ ; 490$x; 830$x
ISBN MATCHING
ISBN subfield rules follow UC-eLinks rules, i.e., matches are made only to the active ISBN e.g., 020 $a, and
not to subfields containing incorrect or canceled ISBN.
OCLC will match on both ISBN and ISBN 13; OCLC match algorithm prefers ISBN 13 and sends this in the
OpenURL. PIR will check using ISBN 10 if no results from ISBN 13.
Note: These are same data elements current Melvyl used to match on items coming from Request.
If the OpenURL does not contain a standard number (ISSN OR ISBN), then go to step 3;
If an ISxN match is made, go to step 4.
STEP THREE: CHECK FOR HOLDINGS MATCHING ON THE ITEM TITLE
Search for a title match using the contents of the jtitle (journal title) or btitle (book title) of the OpenURL
Match the item “title” (jtitle for journals, btitle for books) in the OpenURL to the 245$a (title) or 246$a (variant
title) or 773 $t (host item title) in NGM. Title match it is made title keyword; not a left anchored title phrase.
This is not the same title match used in current Melvyl. Current Melvyl uses a left anchored phrase title
match.
If a match is made, go to Step 4
If a match is not made, skip Step 4, send item to VDX marked for home campus ILL staff review
STEP FOUR CHECK FOR MONOGRAPHIC SERIES INDICATORS
Once a match is made to an NGM record, the NGM matching service looks for a monographic series indicator
(MARC 008/21 =m)
o
if there is no mono-series indicator, then the holdings for the matched record(s) are sent to PIR
o
if there is a mono-series indicator, then NGM runs the routine for Monographic Series holdings
STARTING FROM A SERIAL RECORD FOR AN ITEM IN A MONOGRAPHIC SERIES
IF ISSN PRESENT: ISSN from 022$a plus the volume number from the 440$v 830$v or 490$v volume
o
Use the contents of the 022$a in the serial to match to the 440$x, 830$x or 490$x (in this order)
of the monographic record
IF NO ISSN PRESENT: Use title plus volume from the 440$v 830$v or 490$v volume
2
Explanations of MARC fields can be found at the Library of Congress Marc 21 site
Request/PIR/VDX and the WorldCat Availability Query Service
http://www.loc.gov/marc/marcdocz.html
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o
AQ uses the title 245$a, or 245$a$b in serial item to match to the title 440$a, 830$a, or 490$a
in the series title. If no 245 or 246 the 210 $a (abbreviated title) if present is used for matching
STARTING FROM A MONOGRAPH RECORD WITH A SERIES TRACING
o
ISSN for the series in the 440$x, 830$x or 490$x (in this order) is used for matching to the serial record’s
ISSN in the 022$a
o
If no ISSN, the series title in the 440$a, 830$a or 490$a is used to match to the serial record’s title in
the 245$a ( whole item title) or the 246 $a (whole item variant title)
Note: OCLC will match on truncated titles or titles that differ by a single word. This may cause incorrect
matches.
If UC holdings are found for a mono-series match:
o
Holdings and OCLC number(s) are passed to PIR. PIR handles load balancing; creates the rota; and
sends the request to VDX.
If UC holdings are not found for a mono series match
o
PIR sends the item to VDX with matches to the original item (if any) or sends an empty Rota to VDX.
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SCENARIO 2: USER MAKES A REQUEST VIA UC-eLINKS FROM A LICENSED DATABASE
UC-eLinks sends an OpenURL v 0.1 containing the bibliographic data to Request.
REQUEST USER INTERFACE
Request parses the OpenURL into the component bibliographic fields for user review; collects enduser account
information and passes this to PIR Authentication Service (PIRAuth) and PIRAuth validates the user against
home campus patron database.
Request checks the SFX database for CDL and user’s home campus to check if an electronic copy of the item
may be available. If SFX responds with the information indicating the item may be available electronically, then
the user is offered a link to the electronic version. If user chooses electronic version; Request session ends. if User
continues the request is passed to PIR.
REQUEST/PIR PROCESSING
PIR converts the OpenURL v 0.1 to OpenURL v 1.0.for NGM processing and then PIR passes the OpenURL v 1.0 to
the NGM AQ/Fulfillment server.
The bibliographic information in the OpenURL is the only information Request has to pass to VDX
NGM AQ SERVICE PROCESSING FOR ITEMS FROM ARTICLE DATABAS ES
PIR sends the OpenURL from UC-eLinks to the AQ service. AQ passes the information to the OCLC’s Best Match
service (OU Match), which returns holdings to AQ which then checks for availability and returns information to
PIR
STEP ONE: THE OpenURL CONTAINS AN OCLC NUMBER
Requests that originate in of current Melvyl and some FirstSearch databases have OCLC numbers passed in
the OpenURL. The best match service uses the OCLC number from the OpenURL to find a match in NGM.
If the OCLC number passed to Request matches an item with no UC holdings attached, go to Step 2
If the OCLC number passed to Request matches an item with UC holdings attached, go to Step 4
STEP TWO: NO OCLC NUMBER PASSED TO REQUEST, CHECK FOR UC HOLDINGS USING ISxN
ISSN matching is done against the 022 $a in the OCLC record; ISBN matching is done against the 020$a in
the OCLC record.
This is parallel to the process used when an item from WorldCat has no UC holdings, and PIR sends a second
query using the bib information, but dropping the OpenURL and to the process used when holdings were
obtained from current Melvyl.
If the OpenURL does not contain a standard number (ISSN OR ISBN), then go to Step 3, if match go to Step 4.
STEP THREE: IF NO ISxN IN RECORD THEN THE CHECK FOR MATCH TO WHOLE ITEM TITLE
Search for a title match using the contents of the jtitle (journal title) or btitle (book title) of the OpenURL
Match the item “title” (jtitle for journals, btitle for books) in the OpenURL to the 245$a (title) or 246$a (variant
title) in NGM
OCLC will match on truncated titles or titles that differ by a single word. This may cause incorrect matches.
Check the NGM matched record for the MARC indicator for mono-series go in Step 3.
STEP THREE CHECK FOR MONOGRAPHIC SERIES INDICATOR 1
Once a match is made to an NGM record, the NGM matching service looks for a monographic series indicator
(MARC 008/21=m)
o if there is no indicator, then the holdings for the matched record(s) are sent to PIR
o if there is the mono-series indicator then NGM runs the routine for Monographic Series holdings
STARTING FROM A MATCHED SERIAL RECORD FOR AN ITEM WITH A MONO-SERIES INDICATOR
Fields used for matching:
ISSN from 022$a plus volume number from the 440$v 830$v or 490$v volume or
o Use the contents of the 022$a in the serial to match to the 440$x, 830$x or 490$x (in this order)
of the monographic record
If no ISSN Title plus volume from the 440$v 830$v or 490$v volume
o
AQ uses the title 245$a, or 245$a$b in serial item to match to the title 440$a, 830$a, or 490$a
in the series title. If no 245 or 246 the 210 $a (abbreviated title) if present is used for matching
STARTING FROM A MONOGRAPH RECORD WITH A MONO-SERIES INDICATOR
o
ISSN for the series in the 440$x, 830$x or 490$x (in this order) is used for matching to the serial record’s
ISSN in the 022$a
o
If no ISSN the series title in the 440$a, 830$a or 490$a is used to match to the serial record’s title in the
245$a ( whole item title) or the 246 $a (whole item variant title)
o
440$v 830$v or 490$v is volume number this is not used for matching
NOTE: OCLC WILL MATCH ON TRUNCATED TITLES OR TITLES THAT DIFFER BY A SINGLE WORD. THIS MAY CAUSE
INCORRECT MATCHES.
If UC holdings are found for a mono-series match:
o
Holdings and OCLC number(s) are passed to PIR. PIR handles load balancing; creates the rota; and
sends the request to VDX.
If UC holdings are not found for a mono series match
o
PIR sends the item to VDX with matches to the original item (if any) or sends an empty Rota to VDX.
Request/PIR/VDX and the WorldCat Availability Query Service
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APPENDIX I INTERPRETING OpenURLs
THE BIBLIOGRAPHIC DATA IN THE OPENURL IS THE ONLY DATA INCLUDED IN THE VDX RECORD.
THE QUALITY OF THE OPENURL DETERMINES THE QUALITY OF THE VDX BIBLIOGRAPHIC RECORD.
This section shows how to identify the key information in an OpenURL sent to Request from NGM or from an
article database via UC-eLinks.
Two examples for the same item follow one from an NGM record and one for the same item in an A&I
database. The item is part of a monographic series.
NGM RECORD FOR A VOLUME IN A MONOGRAPHIC SERIES
Monographic Series Title
Monographic Series Title
SAMPLE OPENURL SENT TO REQUEST BY WCL FOR ITEM IN MONOSERIES
The OpenURL contains all of the information sent to the Request service. Request passes all of this information to
VDX. You can copy the OpenURL from the navigation box of the Request form page and paste it into a Word
document to see the bibliographic information being passed from the catalog.
https://request.cdlib.org:4502/request/openurl.jsp?url_ver=Z39.882004&rfr_id=info%3Asid%2Fmelvyl.worldcat.org%3Aworldcat&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&req_dat=%3Csessionid%3E&rfe_dat=%3Cac
cessionnumber%3E52225529%3C%2Faccessionnumber%3E&rft_id=info%3Aoclcnum%2F52225529&rft.aulast=Kiley&rft.aufirst=Michael&rft.auinitm=T&rft.btitle=Ho
w+should+unemployment+benefits+respond+to+the+business+cycle%3F&rft.date=2003&rft.aucorp=Board+of+Governors+of+the+Federal+Reserve+System+%28U.S.
%29&rft.place=Washington++D.C.&rft.pub=Divisions+of+Research+%26+Statistics+and+Monetary+Affairs++Federal+Reserve+Board&rft.genre=book&rft.identifier=H
D7095.U5+K56+2003&req_id=info%3Arfa%2Foclc%2FInstitutions%2F5683
To make the OpenURL easier to read: Paste the OpenURL from the navigation box on the Request form page
into MS Word. Replace the ampersand (&) with ^p&
https://request.cdlib.org:4502/request/openurl.jsp?url_ver=Z39.88-2004
&rfr_id=info%3Asid%2Fmelvyl.worldcat.org%3Aworldcat
&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook
&req_dat=%3Csessionid%3E
&rfe_dat=%3Caccessionnumber%3E52225529%3C%2Faccessionnumber%3E
&rft_id=info%3Aoclcnum%2F52225529
&rft.aulast=Kiley
&rft.aufirst=Michael
&rft.auinitm=T
&rft.btitle=How+should+unemployment+benefits+respond+to+the+business+cycle%3F
&rft.date=2003
&rft.aucorp=Board+of+Governors+of+the+Federal+Reserve+System+%28U.S.%29
&rft.place=Washington++D.C.
&rft.pub=Divisions+of+Research+%26+Statistics+and+Monetary+Affairs++Federal+Reserve+Board
&rft.genre=book
&rft.identifier=HD7095.U5+K56+2003
&req_id=info%3Arfa%2Foclc%2FInstitutions%2F5683
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OCLC PASSED THIS ITEM TO REQUEST AS A BOOK. THE SERIES INFORMATION IS NOT INCLUDED IN THE
OpenURL.
VDX RECORD
WINDOWS
--snip---
Rota is populated
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WEB
--snip---
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EBSCOHOST BUSINESS SOURCE COMPLETE DATAB ASE
Looking for the same item in a licensed database
EBSCOHost Business Source Complete passed this as an article with the series title in the OpenURL.
https://request.cdlib.org:4502/request/openurl.jsp?CALLING_SYSTEM=CDLSFX&xxx=yyy&sid=UCLinksEBSCO%3Abth&aulast=Kiley&month=1&atitle=How%20Should%20Unemployment%20Benefits%20Respond%20to%20the%20Business%20
Cycle%3F&spage=1&genre=article&day=1&epage=30&pages=1-30&title=Working+Papers++US+Federal+Reserve+Board%27s+Finance+and+Economic+Discussion+Series&year=2003&date=20030101&pid=institute%3DUCOP
To make the OpenURL easier to read: Paste the OpenURL from the navigation box on the Request form page
into MS Word. Replace the ampersand (&) with ^p&
Request/PIR/VDX and the WorldCat Availability Query Service
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The OpenURL passed from UC-eLinks to Request
https://request.cdlib.org:4502/request/openurl.jsp?CALLING_SYSTEM=CDLSFX
&xxx=yyy
&sid=UCLinks-EBSCO%3Abth
&aulast=Kiley
&month=1
&atitle=How%20Should%20Unemployment%20Benefits%20Respond%20to%20the%20Business%20Cycle%3
F
&spage=1
&genre=article
&day=1
&epage=30
&pages=1-30
&title=Working+Papers+-+US+Federal+Reserve+Board%27s+Finance+and+Economic+Discussion+Series
&year=2003
&date=20030101
&pid=institute%3DUCOP
VDX RECORD
WINDOWS
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--snip---
Rota is empty
WEB
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Change from OTHER TO “Part of Book” to see details
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