You can either add the concepts of the TBX file to be imported or replace them.
Add concepts
If you choose Add, concepts will be included into an already existing TermBase. No terms will be deleted, overwritten or modified. You cannot keep concept IDs from source in this case.
Replace concepts
If you choose Replace, the entire TermBase will be purged before import proceeds. You may choose to keep the concept IDs from source in this case by clicking the checkbox Import concept ID from source.
You cannot undo replacing concepts once the import has been finalized.
Click Next to proceed to the next step.