Subject: Object Oriented Modeling and Design

Difficulty: Medium

Marks: 4 Marks

Metadata: It is a data that describes other data. For example a class definition is a metadata. UML models are also referred as metadata as they describe the things required for the application. Many real world applications have metadata such as parts, catalogues, blue-prints and dictionaries.

In above example, car model has a model name, year, base price. A physical car has a serial no, color, options. A car model describes many physical car and stores common data about them. A car model is referred as metadata which relates to the data of physical care. A class descriptor object contains feature and they can have their own classes which are known as meta classes.