Do pretty much anything you'd ever want to do to a schema or schema attribute: create, delete, modify, add validations, add transformations, copy, export -- well, you get the idea.
In this section of the documentation
Creating and Deleting Schemas
- Creating a New Entity Type Schema
- Creating a New Schema by Copying an Existing Schema
- Creating a New Schema by Using JSON
- Deleting an Entity Type Schema
Schema Attribute Management
- Adding an Attribute to an Entity Type Schema
- Attribute Data Types, Validations, and Transformations
- Adding an Attribute by Using JSON
- "Building" an Attribute
- Copying an Existing Attribute
- Deleting an Attribute
- Tip: Copying Attribute Names
Attribute Data Types Reference