RankingExpressionBackend

The backend to use for the ranking expression evaluation.

Enums
RANKING_EXPRESSION_BACKEND_UNSPECIFIED Default option for unspecified/unknown values.
BYOE

Deprecated: Use RANK_BY_EMBEDDING instead. Ranking by custom embedding model, the default way to evaluate the ranking expression. Legacy enum option, RANK_BY_EMBEDDING should be used instead.

CLEARBOX

Deprecated: Use RANK_BY_FORMULA instead. Ranking by custom formula. Legacy enum option, RANK_BY_FORMULA should be used instead.

RANK_BY_EMBEDDING Ranking by custom embedding model, the default way to evaluate the ranking expression.
RANK_BY_FORMULA Ranking by custom formula.