The Ars parameter sets an aggregated record EQL filter.
| Parameter | Ars | 
| Name | Aggregated EQL Filter | 
| Java setter method | ENEQuery.setAggrERecStructureExpr() | 
| .NET setter property | ENEQuery.AggrERecStructureExpr | 
| Type | <string> | 
| Description | Sets the Endeca Query Language expression for aggregated record query. The expression will act as a filter to restrict the results of the query. The Ars parameter must be URL-encoded. For clarity’s sake, however, the example below is not URL-encoded. | 
| Object | Aggregated Record (AggrERec) | 
| Dependency | A | 
/controller.php?An=0&A=1&Au=author_nationality &Ars=collection()/record[recordtype = "author" and not(author_name="kurt vonnegut")]