The Endeca 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 the Endeca IAP
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”) is available as an optional
module that extends the MDEX Engine capability.
Note: EQL is not supported by the Aggregated MDEX Engine (Agraph).