Unicorn Indexing: A Behind The Scenes Look SCUUG 2002 Natalie Palermo Louisiana State University.

Unicorn Indexing:A Behind The Scenes Look

SCUUG 2002

Natalie Palermo

Louisiana State University

What’s Behind the Scenes IndexesVariationsHypertext

IndexesBrowseKeyword

Delivered Browse IndexesAuthorMESHPeriodical TitleSeriesSubject (rotated)Title

Browse IndexesRotated: multiple postings of a phrase

with each subfield beginning the phrase NEW ORLEANS LA HISTORY 18TH CENTURY HISTORY 18TH CENTURY NEW ORLEANS LA 18TH CENTURY NEW ORLEANS LA HISTORY

Changes require Rebuild Headings and thus Rebuild Text

LSU Browse Index ChangesCreate new browse index,

LOCAL_NUM, for 035 fieldAdd to title browse index:

240, 246, 524Add to subject browse index:

655

Keyword Index Policy TypesSearchable Keyword IndexNon-searchable Keyword Index Internal Synonym Keyword IndexSynonym List Keyword Index

Searchable KeywordSingle entries from bibliographic recordMapped to internal tags used by BRSFor example, LSU added the following:

027, 035, 043, 088, 210, 243, 247, 351, 510, 524, 538, 541, 586, 653, 655, 752, 760, 773, 856

AUTI for name/title entries Posted 700|t, 710|t, and 711|t to AUTI

Non-searchable KeywordUsed for sorting search results in the

library catalogDoes not represent an entry or group of

entries for searching

Internal Synonym KeywordDefines which entries are searched

when a given type of search is performed

Creation, modification, and removal require changes to BRS equivalent field definitions

Searches qualified by internal synonyms are more efficient

Changes require Rebuild Text

Delivered Internal Synonyms

Index Synonym MARC Entries

Author AU 100, 110, 111, 700, 710, 711

Series SE 400, 410, 411, 440, 490, 800, 810, 811, 830, 840

Subject SU 600, 610, 611, 630, 650, 651, 690, 691

Title TI 130, 245, 440, 730, 740

LSU Additions to Internal Synonym Keyword IndexesAdd to title keyword index:

240, 246, 440, 490, 505, 524, 830, AUTIAdd to author keyword index:

505

Synonym List KeywordDefines which entries are searched

when a given type of search is performed

Definable without requiring modifications to BRS configuration

Less efficient searchGENERAL is an example of a synonym

list keyword index

VariationsEach catalog format entry ID has its

own browse and keyword variationsVariations can be in addition to others

or supersede othersVariations can be based on:

indicators subfields leading articles

Serial 246 Browse 1

Serial 246 Browse 2

Serial 780 Browse 1

Serial 780 Browse 2

Serial 246 Keyword 1

Serial 246 Keyword 2

Serial 780 Keyword 1

Serial 780 Keyword 2

HypertextSubfields used in hypertext searchHypertext search types:

Partial Exact Keyword

Hypertext Search SubfieldsFor each entry ID, you can determine

which subfields are included in a hypertext search

To improve the likelihood of finding matching records, do not include subfields that narrow the search

Serial 246 Hypertext Subfields

Serial 780 Hypertext Subfields

Hypertext Configuration In WorkFlows, go to global configuration

to set the hypertext search type In iLink, set the hypertext search type in

the following environment variable: LIKESEARCHTYPE

Partial Hypertext SearchPartial lookup in the browse index

specified in first browse variationBuilds an "OR" search string of the

matched heading keysReturns the results identified to the

point of the search string character limit

Partial Hypertext Search If the search string limit is met, you will

get one of the following messages: iLink message:

Results list truncated – too many terms WorkFlows message:

Partial search results too longDelivered default value and best choice

for most libraries

Exact Hypertext SearchExact lookup in the browse index

specified in first browse variationMay be the best choice for some large

libraries

Keyword Hypertext SearchLookup in the keyword indexesUses keyword index specified in first

keyword variationOnline help does not recommend this

type

Hypertext Search Subfields In this example, all 780 subfields are

included in the hypertext search: Journal+of+the+American+Medical+Association+0

002-9955+(DLC)+++07037314+(OCoLC)1480379

It’s highly unlikely that a match will be found for this search string

Hypertext Search Subfields In this example, only 780 |t is included

in the hypertext search: Journal+of+the+American+Medical+Associ

ation It’s very likely that a match will be found

for this search string

Contact Information:

Natalie Palermo

Systems Librarian

Louisiana State University

[email protected]