Formal Language Theory
Regular expressions describe regular languages in formal language theory. They have the same expressive power as regular grammars.
Read more about this topic: Regular Expression
Famous quotes containing the words formal, language and/or theory:
“True variety is in that plenitude of real and unexpected elements, in the branch charged with blue flowers thrusting itself, against all expectations, from the springtime hedge which seems already too full, while the purely formal imitation of variety ... is but void and uniformity, that is, that which is most opposed to variety....”
—Marcel Proust (1871–1922)
“A president, however, must stand somewhat apart, as all great presidents have known instinctively. Then the language which has the power to survive its own utterance is the most likely to move those to whom it is immediately spoken.”
—J.R. Pole (b. 1922)
“... the first reason for psychology’s failure to understand what people are and how they act, is that clinicians and psychiatrists, who are generally the theoreticians on these matters, have essentially made up myths without any evidence to support them; the second reason for psychology’s failure is that personality theory has looked for inner traits when it should have been looking for social context.”
—Naomi Weisstein (b. 1939)