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A logical data model (LDM) provides a detailed overview of the entire set of data created and maintained by an organization.
It is a diagrammatic presentation of the organization’s data and its representation is independent from the underlying database technology.
Techopedia Explains Logical Data Model
A logical data model generally consists of data entities, keys and the attributes and relationships between the entities. It is a way of defining the organization’s data and the business rules that govern the relationship between them. It is generally considered the implementation of the conceptual data model.
The LDM also helps in creating the physical data model and provides a road map for designing the physical database. Typically, the layout of the LDM varies, as it aims to define the data as much as possible, regardless of how it is to be implemented via technology.
