One of the most important steps in desiging a database is establishing the data model. Part one of a two-part article describes how to create a logical model.

Logical Schema. A logical data model or logical schema is a representation of the abstract structure of the information domain that defines all the logical constraints applied to the data stored.

However, within the logical data model the goal is to express the business rules and logic. Therefore, abstractions do not have to be avoided, but they should be used surgically. When an area of the ...

In the simplest terms, a logical data model is a visual representation of the business rules and requirements covering the universe-of-discourse for a given solution or enterprise, along with some ...

Logical data models detail how entities in the conceptual model map to tables, fields, indexes and relationships within a relational database. For example, a relational table may represent an ...

The data storage unit is still a single database for information retrieval purposes. To have a logical database, all given hard disks and information files must be accessible from a single source.

MISMO, the standards development body for the mortgage industry released its logical data model as the next generation of the MISMO data exchange, according to a press release.The new model has the ...

Logical data model provides underlying structure for communication companies` customer relationship management information needs. By Alison Bull Communications. Johannesburg, 10 May 2001.