Modeling language and techniques are used by computer methodologies to create a representation of reality. These models may be used to assist in the explanation of complex structures or processes, concentrating on key and essential features while ignoring irrelevant or confounding detail.
Modeling language can be part of a computer methodology, but a computer methodology includes other elements such as a description of a software development process (activities, artifacts, and actors). A modeling language can be based on a graphical notation or on a set of mathematical equations.
More information