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## 18.5.7.9 Data Profile Column Annotations

Add Data Profile Column annotations using the Additional Info attribute.

In addition to a properly configured data type, format mask (for dates), and REST payload selector, you can use the Data Profile Column Additional Info attribute to include a comma-separated list of one or more of the following case-sensitive tag names used to optimize how APEX communicates with the REST Data Source endpoint:

- `RemotePK` - Omit null remote primary keys from create payloads so the service defaults their values.
- `CreateOnly` - Exclude column from update payloads.
- `ReadOnly` - Exclude column from DML payloads.
- `HasDefault` - Omit a null-valued column from create payload to prioritize the serverside default.
- `Required` - Not currently enforced but useful to be aware of (and possibly enforced by APEX in the future).

Parent topic: Working with REST Data Sources for Oracle Cloud SaaS Applications