keyword
1. One of a fixed set of symbols built into the syntax of a language. Typical
keywords would be if, then, else, print, goto, while, switch. There are usually
restrictions about reusing keywords as names for user-defined objects such as
variables or procedures. Languages vary as to what is provided as a keyword and
what is a library routine, for example some languages provide keywords for
input/output operations whereas in others these are library routines.
2. A small set of words designed to convey the subject of a technical article.
Some publications specify a fixed set of keywords from which those for a
particular article should be chosen.
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