Depending on the URI supplied as a query, the Open PHACTS mapping system may or may not be used for retrieving results which can affect the output JSON structure.

If the query uses a URI that is present in the original data set, the mapping system is not called and the results will appear as follows (i.e. the chemical info data are found in the primaryTopic block)

If the URI used as a query require a mapping step, the chemical info data will be found in the exactMatch block