Guide to exercise 2
Brief examples
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Objectives
• Using fields and different operators • Explore federated searching on Dialog – called OneSearch • Here we will give limited examples – the rest is in the Exercise for unit 2 • And a few useful operators
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Truncations: variation of terms
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Proximity operators: phrases and terms in neighborhood
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Stop words
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note on fields in Dialog
Dialog has two kind of indexes & they allow for searching in different fields:
Basic Index:
when a search term is entered the whole Basic Index is searched by default to search only a given field, e.g. title then the search is for xxxxxxx/TI
Additional indexes:
to search for an author or journal the search term is AU=xxxxxxxx or JN=xxxxxxxx
Combined search is possible:
select search AND engine? AND AU=xxxxx select search engine?/DE AND JN=xxxxx
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OneSearch by steps
Getting to OneSearch – searching a number of databases simultaneously AKA federated search
1
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Choosing databases already selected in given broad areas
2
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3
One can select all or clear selection and then select any one or few
If Select All then the command line shows the command. Click on Submit.
Button selections show in command line, not only in Dialog but in many other vendors
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search for variations & restrictions on search engines – three databases searched simultaneously
•S3 = ss search AND engine?
• in that search S1 shows no. of items for search and s2 for engine?
•S6 = no. of items after duplicates were removed •S8 = ss S5 and publication years 2008 and 2009
• S7 shows how many items for these years were included • S8 = 48 items published in those years with a descriptor search engine ?
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Variations on the theme for author searching
•S1 = zero because no author was mentioned only like that •S2 = there was only one entry that had Saracevic, T. •S3 = 99 entries of author Saracevic, T?, meaning any variation after letter T •S4= removed duplicates from 3 databases searched •S5 = all kinds of authors with the last name Saracevic •S6 = duplicates removed
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