How could you also separately check for changes to data types in the schema?

How could you also separately check for changes to data types in the schema?

• A. Add a ChangeDetector_2 connected to the same ports as the ChangeDetector and set Selected Attributes to only fme_data_type.
• B. Add a TestFilter and create tests for changed data types.
• C. Add a TypeChangeDetector transformer after the ChangeDetector.
• D. Add fme_data_type to the ChangeDetector Selected Attributes.

Answer: (A)

Change detection is about noticing when something changes from one feature to the next. To catch changes in the schema itself, you want to monitor the system attribute that carries the data type information, fme_data_type. By dropping a second ChangeDetector onto the same input/output ports and configuring it to monitor only fme_data_type, you create a separate stream that flags whenever the data type changes. This isolates schema changes from regular data changes, making it easy to route or respond to, without muddying the results from the main detector that watches other attributes. The other approaches either don’t target the schema signal directly (a general test filter), rely on a different detector that isn’t specifically aligned to schema changes, or would mix the data-type signal with other monitored attributes in the same detector, which makes interpretation harder.

Change detection is about noticing when something changes from one feature to the next. To catch changes in the schema itself, you want to monitor the system attribute that carries the data type information, fme_data_type. By dropping a second ChangeDetector onto the same input/output ports and configuring it to monitor only fme_data_type, you create a separate stream that flags whenever the data type changes. This isolates schema changes from regular data changes, making it easy to route or respond to, without muddying the results from the main detector that watches other attributes. The other approaches either don’t target the schema signal directly (a general test filter), rely on a different detector that isn’t specifically aligned to schema changes, or would mix the data-type signal with other monitored attributes in the same detector, which makes interpretation harder.