Rules you can read.
Results you can explain.

What counts as a match?

With prefixes enabled, rank can match ranking. Misspellings and semantic meaning are not inferred.

Which fields lead?

Body weight is fixed at 1. A query group scores at most once per field.

A preferred topic adds two points only after a record meets the query and facet rules.

Connect the words.

One group per line. Use 2–6 comma-separated single words. Up to 8 groups. A word may appear in only one group. Blank means no synonyms.