TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

In applying a rule, each premise clause is examined in turn and its goal pursued in the same way, recursively. Thus, backward chaining refers to the process of recursively applying rules according to the goals that they conclude about.  4, record 1, English, - backward%20chaining

Record number: 1, Textual support number: 2 CONT

The back-chaining sequence ends when a question is asked or a previously stored result is found.  5, record 1, English, - backward%20chaining

Record number: 1, Textual support number: 1 OBS

As opposed to "forward chaining".  6, record 1, English, - backward%20chaining

Record number: 1, Textual support number: 2 OBS

backward chaining; back chaining : terms standardized by CSA and ISO.  6, record 1, English, - backward%20chaining

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

On peut distinguer deux modes de fonctionnement du moteur d'inférence. Si le moteur raisonne de manière régressive - on dit qu'il fonctionne en chaînage arrière. Il s'assigne un but à atteindre (hypothèse) et recherche la manière d'y parvenir. Sinon, le moteur fonctionne en chaînage avant.  2, record 1, French, - cha%C3%AEnage%20arri%C3%A8re

Record number: 1, Textual support number: 2 CONT

[Quand] la résolution du problème se fait du problème initial vers les primitives, en passant par une décomposition en sous-problèmes, ce type de résolution est appelé chaînage arrière.  3, record 1, French, - cha%C3%AEnage%20arri%C3%A8re

Record number: 1, Textual support number: 1 OBS

chaînage arrière : terme normalisé par l'ISO/CEI et la CSA.  4, record 1, French, - cha%C3%AEnage%20arri%C3%A8re

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A conditional statement of two parts. The first part, comprised of one or more if clauses, establishes conditions that must apply if a second part, comprised of one or more then clauses, is to be acted upon. The clauses of rules are usually A-V pairs or O-A-V triplets.  2, record 2, English, - rule

Record number: 2, Textual support number: 2 DEF

Procedural knowledge on how to reason in a domain expertise. (If ... [this animal] has feathers then it is a bird.)  3, record 2, English, - rule

Record number: 2, Textual support number: 3 DEF

A pair, composed of an antecedent condition and a consequent proposition, which can support deductive processes such as back-chaining and forward-chaining.  4, record 2, English, - rule

Record number: 2, Textual support number: 1 OBS

See if-then rule.  5, record 2, English, - rule

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

[...] les règles permettent d'exprimer des relations générales entre les objets et leurs attributs : «tous les animaux ayant des branchies sont des poissons», «si un entier plus grand que 2 a exactement deux diviseurs, il est impair», «toute base se compose avec un acide pour produire un sel et de l'eau».  2, record 2, French, - r%C3%A8gle

Record number: 2, Textual support number: 2 CONT

Chaque règle est un morceau indépendant de connaissances, c'est-à-dire qu'elle contient toutes les conditions de son application.  3, record 2, French, - r%C3%A8gle

Record number: 2, Textual support number: 3 CONT

[...] les connaissances générales [peuvent être stockées] sous la forme de règles; [...]  4, record 2, French, - r%C3%A8gle

Record number: 2, Textual support number: 1 OBS

Voir règle de raisonnement, règle de production, règle conditionnelle.  5, record 2, French, - r%C3%A8gle

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Moteur qui part des conclusions à démontrer.  1, record 4, French, - moteur%20d%27inf%C3%A9rence%20%C3%A0%20cha%C3%AEnage%20arri%C3%A8re

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

In this system, the rule-based system (RBS) begins with a goal and successively examines any rules with matching consequent components.  2, record 5, English, - backward%20chaining%20system

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 OBS

The first expert system building tool. EMYCIN was derived from the expert system MYCIN. After the developers of MYCIN completed that system they decided that they could remove the specific medical knowledge from MYCIN(hence Essential MYCIN). The resulting shell consisted of a back-chaining inference engine, a consultation driver, and several knowledge acquisition aids. This shell, or tool, could then be combined with another knowledge base to create a new expert system.  1, record 6, English, - Essential%20MYCIN

Record 6,  Textual support,  French

Record 6,  Textual support,  Spanish