The Stratify module is used to boost or bury records in the result set. It takes one or more Endeca Query Language (EQL) expressions and groups results into strata. Records are placed in the stratum associated with the first EQL expression they match. The first stratum is the highest ranked, the next stratum is next-highest ranked, and so forth. If an asterisk is specified instead of an EQL expression, unmatched records are placed in the corresponding stratum.

The Stratify module is the basic component of the record boost and bury feature, which is described in the MDEX Engine Development Guide.