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.
4
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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