A quick question: the “maps_to_value” flag is lost in the ‘source_to_concept_map export’ from Usagi, but they are correctly saved in the ‘export codes for review’. Does this mean that only direct lookup tables are supposed to be used in this cases instead of including them in the source_to_concept_map table?
The OMOP source_to_concept_map table does not have a column for the mapping relationship. So we cannot include that information in the export. If you wish to work with the other mapping relationships, please consider using the regular usagi save format in your mapping scripts.
There is a proposal on a new source to concept map table, but we are still discussing the format. See Wide MAPPING table (in vocabulary) (problems with relationship)
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If you want to map source values to standard concept_ids using other relationship_ids, you will need to create custom concept_ids, the 2 billionaires, in the Concept table. And then map them to standard concept_ids in the Concept Relationship table.