Glossary of Unified Modeling Language Terms - M

M

• Merge - a point in an Activity diagram marking the end of the optional behavior started by a Decision
• Message - a signal from one object (or similar entity) to another, often with parameters. Often implemented as a call to a Method, including the Constructor and Destructor, of an Object in a Sequence diagram.
• Metadata -
• Metamodel -
• Metamodeling -
• Metamodeling technique -
• Meta-Object Facility -
• Method -
• Modeling -
  • Domain - the representation of real world conceptual entities
  • Design - the representation of software Classes and Interfaces
  • Dynamic - use of Interaction diagrams to describe collaborations and behavior
• model -
• Model-driven architecture (MDA) -
• Multiplicity - 1. A specification of the number of possible occurrences of a property, or the number of allowable elements that may participate in a given relationship. In UML 1.x, it was also possible to have a discrete list of values, but this was eliminated in UML 2.0. 2. It specifies how many objects may be connected across an instance of an association which is written as a range of values(like 1..*).

• • Mandatory - A required multiplicity, the lower bound is at least one, usually 1..1 or 1
  • Optional - The lower bound is at most zero, usually, 0..1
  • Many - A multiplicity with no upper limit, either 0..* or *
  • Forbidden - No elements allowed, 0..0 (in UML 2.2)