The keywords for every submission are determined by extracting the unique "words" from the title, abstract, and body of the article. These "words" can be alphanumeric, since this is a technical database. You can require words in your search by using a plus (+) sign in front of the word. You can exclude entries containing specific words in your search by using a minus (-) sign in front of the word. The or (|) sign is optional, indicating words that may appear in the search but are not required.

Wildcards are also supported for searching. The asterisk (*) is the wildcard for one or more characters in the pattern match. The question mark (?) is the wildcard for a single character.

The following table provides some examples. Keyword matching is case-insensitive.