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Lesson 3: Using Search Commands in DialogWeb

Objectives

In this lesson, you will learn to:

 

Introduction

We are now ready to conduct the search to get Brian the information about the Main Mission Antenna in the Iridium project.

Before we start, I better send Brian a note to let him know we should have the information for him in minutes!

Brian —
I should have the information on the antenna in the Iridium project that you wanted. I've already checked a few databases and apparently there are articles in the engineering literature on the topic. I'll try to get as much on the topic as I can and send it right over.
Chris



In this lesson we will look briefly at the basic commands necessary to perform this search and use the commands in the Command search version of DialogWeb to see results.


The Command Search Main Page contains:

command_search

In addition, as we saw in Lesson 1, we can click on Databases to browse through a list of databases. Available too is a link to Dialog's Alerts feature. View one of the following DialogWeb Tutorials to learn more about Alerts:

Go to the next page.


3-1

Authoritative Answers Enriched by ProQuest

Learn More #3: Logical Operators:

  1. The OR operator is used to retrieve terms that are synonyms or equivalents. For example, the retrieval of INTERNET OR WORLD(w)WIDE(w)WEB consists of all records containing one or both of these terms. OR increases the number of records retrieved-in other words, with OR you always get mORe. If more than one of the terms occurs within a given record, the retrieved set includes the record only once.

    Example:
    select protect? OR shield?




  2. The AND operator retrieves records where two or more search terms or groups of search terms occur in the same record. SELECT PROFIT(W)SHARING AND PRODUCTIVITY retrieves only those records containing all of these words. AND decreases the number of records retrieved since it requires each term to be present for retrieval.

    Example:
    select japan AND export?

    select market(5n)share AND long(w)distance(w)service




  3. The NOT operator prevents records that include unacceptable or irrelevant search terms from being retrieved. The expression PROFIT(w)SHARING NOT DEFERRED(w)PAYOUT(w)PLAN retrieves records that contain the term PROFIT SHARING but excludes those records that also contain the term DEFERRED PAYOUT PLAN.

    Example:
    select eclipse? not solar

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