The logical data layer defines data structures within an organization's systems, whereas the conceptual data layer represents context-independent data structures within an organization.
The Data Entity-Data Attribute structure is closely related to the Data Domain-Data Concept structure of the conceptual data layer. The main difference between the two is that the conceptual data layer is context-independent, whereas the logical data layer describes the structure in an individual System.
The logical data layer consists of the following asset types:
The logical data layer can be visualized as a tree-like structure, starting with a high-level System and Data Model assets, and branching out with implementation-specific Data Entity and Data Attribute assets.
Note Although the System asset type is a Technology Asset, it adds higher-level structure to the logical data layer and is considered part of the logical data layer.