约束( constraint) e a constraint refines a model element by expressing a condition or a restriction in a textual statement to which the model element must conform
约束 (constraint) A constraint refines a model element by expressing a condition or a restriction in a textual statement to which the model element must conform
Member-of Person i subset] Committee Represents an incor porated entity y 1 Chair-of constraint between associations constraint as note I constraint on single class worker employee employer boss 0.1 Person .cOmpany Person. em ployer= note constraint on path Person. boss. employer]
ATH Transaction ·ant:邢e搅日t娃yan
标记值( Tagged value) e a tagged value can be used to add properties to any model
标记值 (Tagged Value) A tagged value can be used to add properties to any model
Web server (Os a Solaris tweb server= apache (number deployed 3) herculesweb war