The instructions on this page describe how to define and execute a search in the project navigator using advanced search. You can also define and execute a search using basic search.
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What is advanced search?
An advanced search in the project navigator allows you to use structured and complex queries to search for projects.
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You can see how easy this can be in the video below. 
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A simple query in PQL consists of a field, followed by an operator, followed by one or more values. For example, the following simple query will find all projects whose Technology ( id=23 ) is "Java":
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