Domain Model Attributes

A domain model in problem solving and software engineering can be thought of as a conceptual model of a domain of interest often referred to as a problem domain which describes the various entities their attributes and relationships plus the constraints that govern the integrity of the model elements comprising that problem domain.

Domain model attributes. Rooms in hotel 1 300 age 1 99 married yes or no nationality nepalese indian american or british colors red yellow green for the relational model it is a requirement that each part of a tuple be atomic. The model can then be used to solve problems related to that domain. Boolean string real integer sometimes more complex but not domain specific.

Persistence ignorance pi is another well known concept and desirable attribute of domain model. Change in one thing should have minimal impact on other and vice versa. Attributes an attribute is the description of a named slot of a specified type in a domain class.

Attributes in domain model useful to identify those attributes of conceptual classes that are needed to satisfy information requirements of the current scenarios under development. In domain model use data type attributes primitive data types. We don t want to have high coupling between our model and the persistence store.

Informally a conceptual class is an idea thing or object. A data type is a primitive type or a complex type where for instances a and b. In computing the attribute domain is the set of values allowed in an attribute.

Features of a domain model domain classes each domain class denotes a type of object. More formally a conceptual class may be considered in terms of its symbol intension and extension m095. Symbol words or images representing a conceptual class.

A domain model is a system of abstractions that describes selected aspects of a sphere of knowledge influence or activity a domain. Full syntax for an attribute in the uml is. Each instance of the class separately holds a value.