a language in which terminology, syntax, and/or semantics are constrained
a language with a restricted syntax and vocabulary
Language with a restricted vocabulary and restricted rules of formulation. Used, for example, in technical documentation to make the text easier to understand for users or for non-native speakers and to facilitate machine translation.
A thesaurus of permitted terminology used to ensure consistency of indexing, either manual or electronic, to facilitate searching by providing the user with a list of preferred terms.