A computational framework for lexical description
Graéme Ritchie, Stephen Pulman, Alan W. Black, Graham J. Russell · 1987
this paper are taken from our implemented description and hence will contain this fifth field, with a value of NIL). There are two classes of rules. Lexical rules (of which there are three types) express relationships between entries, or between fields within entries, and have a procedural interpretation which maps a set of basic entries into a possibly larger set of entries with more specified categories. Morphological rules (of which there are two types) express relationships between characters and morphemes within a word, and have a procedural interpretation which allows a string of characters to be decomposed into a structural analysis of a word. There is also a very simple -4mechanism for defining default values for syntactic features, which does not properly fall into either of these classes of rules. The lexical rules are of the following types: