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Verity Ultraseek has developed a simple query syntax which
gives you the pinpoint search power of Boolean logic, without having to remember
complex queries. The table below shows the Verity Ultraseek operators that correspond
to Boolean operators:
Verity Ultraseek
operator |
Boolean
equivalent |
default operator:
you need not use any
special symbols |
OR |
| + |
AND |
| - |
NOT |
phrase operator:
enclose the phrase with
double quotation marks |
ADJ |
Boolean queries use the logical operators AND, OR, NOT and ADJ (adjacent).
Suppose you wanted to find plain paper color laser printers made by companies
other than HP. This query can be specified in Boolean logic as:
(laser ADJ printer) AND (color OR (plain ADJ paper))
AND NOT (HP OR Hewlett-Packard)
Using Verity Ultraseek operators, the complex query above may be typed into
the search box as:
+"laser printer" color "plain paper" -HP,
-Hewlett-Packard
This query specifies that:
- All returned documents must contain the phrase "laser
printer".
- Documents containing one or more of the terms "laser printer", color,
or "plain paper" will be ranked at
the top (the more terms matched, the higher the ranking).
- None of the documents returned will contain either HP or Hewlett-Packard.
Statistical Weighting and Verity Ultraseek Searches
A
traditional Boolean search returns an unsorted list of all items
that match the search condition. Verity Ultraseek goes considerably
beyond this by using advanced statistical search technology to
return the results sorted with the "best" matches
listed at the top. Unlike plain Boolean searches, Verity Ultraseek automatically weights
your query terms based on their statistical uniqueness. Common terms, such as "shall," get
a much lower weighting than less frequently occurring terms, such as the phrase "golf
courses."
Verity Ultraseek's advanced statistical weighting allows you to just
type in relevant words and phrases, and the system will provide
the answer to your query in the top few documents! Since there
are cases in which it is convenient to narrow a query using Boolean
operators, Verity Ultraseek allows you to use the + and - Boolean operators.
With Verity Ultraseek, you get the accurate ranking of statistical searching
combined with the information filtering of Boolean searching.
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