A primary query mode that lets you enter plain English queries with no operators; automatically does semantic expansion on all query words to the level you set; ranks returned documents for relevance.
A primary query type that also processes plain English queries, but tolerates spelling differences in either the body of the text or the queries; automatically does pattern expansion on all query words to the number of words you set; ranks returned documents for relevance.
A primary query type that uses traditional Boolean operators to find exact matches for all query words you enter; no ranking of responses; no automatic expansion.
A query performed against the document metadata, it limits responses by allowing you to enter specific metadata fields (such as a full or partial title, collection, author, etc.). A metadata field search can be done against metadata only (one or more fields at a time) or in conjunction with a full-text keyword query.
A query that substitutes part of a word, name, or number with a wildcard character (*, ?, [search expression], _, @, #, \, ^ ) to substitute for unknowns in the search terms or database, or to search for multiple terms; wildcards can be used in Concept or Boolean mode (not Pattern), in full text search or field entries, in multiple words, and even multiple times in one word.