Reverse queryingThis is a very powerful facility that instructs the database to automatically search the 'mirror' of a particular transaction. A search for a particular country's exports will also check all other countries' declarations of their imports. Similarly, a search for a country's imports will also reveal exports to it by all other countries. In this way a more complete dataset can be generated. For example, the German Democratic Republic (DDR) did not release any information about its SALW exports. However, it is possible to build up a partial picture of the DDR's exports as a reverse queried search will produce a table of all countries that have declared imports from the DDR. Please take note that reverse querying can generate very large datasets. Therefore it is wise to limit other parameters (such as the start and end date).
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