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... It may be a model of a building, car, landscape design, a computer database, etc. ... It is the blueprint of a database. A model helps the creator visualize the database and answers questions such as: What information needs to be tracked, how does that information relate to each other, which needs this information, etc. ... Any type of drawing (ERD) will help to define the structure of the database, the tables, and the relationships.
“The Unified Modeling Language™ (UML) is the industry-standard language for specifying, visualizing, constructing, and documenting the artifacts of software systems. ... UML is now considered an acceptable standard for the OMG (Object Management Group). Vendors of CASE (Computer Aided Software Engineering) products now recognize, and endorse UML. ... com
There are four types of relationships in the UML, they are:
Dependency – A semantic relationship where a change in one field has an affect on another field
Association – A structural relationship between two fields or objects, also known as links
Generalization - A specialized relationship among fields where the child can take on the elements of the parent
Realization - A semantic relationship found in two places; between interfaces and components, and between use cases and the collaboration that realize them.
Approximate Word count = 701
Approximate Pages = 2.8
(250 words per page double spaced)
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