What is the primary key in an Ontology object type?

What is the primary key in an Ontology object type?

• A. The unique identifier for objects of a type that maps to a column in the backing dataset.
• B. A generated random string that is not tied to the dataset.
• C. A label used for user interface display.
• D. A timestamp indicating when the object was created.

Answer: (A)

In an Ontology object type, the primary key serves as the unique identifier for each object instance and it maps to a column in the backing dataset. This means every object has a stable value in that key that corresponds to a specific row in the underlying data, enabling reliable identification, joins, and data lineage across the model. A generated random string wouldn’t align with the dataset’s rows, so it couldn’t consistently identify records. A label is only for display and isn’t guaranteed to be unique or stable. A timestamp captures when something was created, not a persistent identity. The dataset-backed, unique identifier approach is what makes the primary key the correct concept here.

In an Ontology object type, the primary key serves as the unique identifier for each object instance and it maps to a column in the backing dataset. This means every object has a stable value in that key that corresponds to a specific row in the underlying data, enabling reliable identification, joins, and data lineage across the model. A generated random string wouldn’t align with the dataset’s rows, so it couldn’t consistently identify records. A label is only for display and isn’t guaranteed to be unique or stable. A timestamp captures when something was created, not a persistent identity. The dataset-backed, unique identifier approach is what makes the primary key the correct concept here.