Based on FME Documentation , you should avoid manually defining attributes and instead follow these standard methods:
: For workflows where the output structure changes (dynamic writing), you can control Feature Type Parameters through the gear icon on the feature type to handle various geometries and attributes. Common Writer Operations
: Use this transformer to write data at any point during your transformation rather than just at the end. This allows for post-processing, such as generating reports or sending notifications based on the success of the write operation.
: Requires a specific Row Selection condition (usually an ID field) to identify which records to modify. Adding Writer Feature Types - FME Documentation
To "write a feature" for the project (or a similar FME-based workflow), you generally need to define a Feature Type within a Writer or use a FeatureWriter transformer to handle data mid-workflow. Key Steps to Write a Feature
When configuring your feature writer, you can specify how it interacts with the destination: : Adds new records (default behavior).