Opening the writer feature type dialog and adding a new attribute is a form of:

• A. Schema Mapping
• B. Structure Componentizing
• C. Schema Editing
• D. Data Refreshing

Answer: (C)

You're changing the structure of the data you're going to write. Opening the writer feature type dialog and adding a new attribute alters the output schema by introducing a new field, its name, and possibly its type or default. That act is schema editing—modifying the metadata that describes what fields (attributes) exist in the dataset. It’s not about mapping input attributes to outputs (which would be schema mapping), nor about breaking down data structures (structure componentizing) or refreshing data sources (data refreshing). So adding a new attribute to the writer’s schema is a schema editing operation.