The work reported has been principally motivated by the search for more effective Boolean operators
. Other approaches to the modeling of Boolean query operators have been tried.
The Boolean operators
are linked in a tree-like structure that is quite hard to follow since all search attributes are also displayed.
Key Words: information storage and retrieval; PubMed searching, Boolean operators
, search field tags, wildcard, use of keywords.
A small proportion of students (N=2) recognised that WSE's had electronic Web crawlers that collect information to store in a database, used Boolean operators
Our talks with students have indicated that one of the sources of their troubles is the failure to perceive Boolean operators
as operations on sets of matching documents.
Using the syntax, #1 AND #2, combine the appropriate searches using the Boolean operators
AND, OR, or NOT By experimenting with different combinations of terms, you can determine which produces the most relevant results for your particular search question.
OF Boolean operator
allows the user to specify how many terms from a list of terms must be present if it is not necessary to have all terms in the list.
* Use Boolean operators
: These include and, and not, or and parentheses.
"AND," "OR," and "NOT" can be used in searching.
Module 3: "Searching for Studies" offers particularly relevant topics for librarians, including a clearly presented video on how to use Boolean operators
Chandrakumar (2009) found that the search strategies like Boolean operators
or phrase searching were rarely used by the researchers.
When searching Google Trends, it is important to note that advanced searches with Boolean operators
and faceting do not usually provide results.