Semantic Data Model(Sem-ODM) Benefits (Cont.)
Data is described at conceptual level.
Meaning of Information is Stored
Relationships Between Categories
Easier to formulate query
- Any Relationship CAN be queried.
- Joins are NOT required to be defined explicitly.
Data is described at logical level.
Meaning of Information is Lost
Relationships not Supported
Complex queries have to be pre-programmed
- “Joins” are required to be defined explicitly.