L’énoncé the class permet de spécifier des attributs, des ensembles, des méthodes, et des méthodes processus de la classe et non des objets.
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![{\displaystyle {\begin{aligned}&\color {blue}{\text{the class }}\color {black}\left[\color {blue}{\text{has }}\left[{\text{a}}\right]\color {black}\left\{{\begin{matrix}Liste\_Attribut\\Liste\_M{\acute {e}}thode\\\end{matrix}}\right\}^{c}\left[{\begin{aligned}&\color {blue}{\text{method}}\\&\color {blue}{\text{function}}\\\end{aligned}}\color {black}\right]\right]\\&\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \left[\left[\color {blue}{\text{and}}\color {black}\right]\ \color {blue}{\text{is}}\ \left[{\text{a}}\right]\color {black}Nom\_Classe\right]\\&\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \left[\left[\color {blue}{\text{and}}\color {black}\right]\ \color {blue}{\text{owns}}\ \left[{\text{a}}\right]\color {black}Liste\_Ensemble^{c}\right]\\&\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \left[\left[\color {blue}{\text{and}}\color {black}\right]\ \color {blue}\left[{\text{may}}\right]{\text{ belong to}}\color {black}\ Liste\_Ensemble^{c}\right]\\&\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \left[\left[\color {blue}{\text{and}}\color {black}\right]\ \color {blue}{\text{override }}\ \color {black}Nom\_M{\acute {e}}thode^{c}\left[\color {blue}{\text{method}}\color {black}\right]\right]\\\end{aligned}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/44bff1292887d2415d023c92cf242420069affbb)
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Exemple :
begin class Client
the class
has a Temps_Attente, '' en minutes,
a Visiter_Banque process method,
and a Générer_Client process method
define Temps_Attente as a real variable
tally Moyenne_Quotidienne_Temps_Attente as the QUOTIDIEN mean,
Moyenne_Temps_Attente as the mean,
Histogramme_Temps_Attente (0.0 to 100.0 by 5.0) as the histogram
of Temps_Attente
define Générer_Client as a process method
given 2 real values ''la longueur de la journée en heures
'' la moyenne d'inter-arrivée
end '' Client
