The Oracle Commerce Query Language (EQL) contains a rich syntax that allows an application to build dynamic, complex filters that define arbitrary subsets of the total record set and restrict search and navigation results to those subsets.

Besides record search, these filters can also be used for dimension search. EQL is available as a core feature of Oracle Commerce Guided Search with the capabilities listed in the next section, “Basic filtering capabilities”. In addition, Record Relationship Navigation (RRN) (described in the topic “Record Relationship Navigation module”) extends the MDEX Engine capability.