Module rank 

Merging hits from different sources.

Each source finds and ranks its own hits (through a SearchCatalog or a ListIndex); a surface that shows several sources in one list merges them by their provider bias and how the query meets the title each hit shows, so an exact visible title beats a weak match from another source.

Structs

FieldWeight

The share of MAX_FIELD_RANK a match in one field is worth, in percent.

Enums

MatchTier

How strongly a query matched one field; later variants are stronger.

Functions

match_tier

The tier at which folded query meets folded text, if it occurs: exact, prefix, a later word start, or anywhere.

result_relevance

How the query meets one displayed hit, for merging sources: the tier in its title, else in its subtitle at subtitle weight.