Types: All rank feature values are floats. Ints are converted to exact whole value floats. String values are converted to exact whole value floats using a hash function. String literals in rank expressions are converted using the same hash function, to enable equality tests on string values.
Features which are normalized are between 0 and 1, where 0 is always the minimum and 1 the maximum. Normalized features should normally be preferred because they are more easily combined by ranking expressions into a complete normalized score.
A query may override any rank feature value by submitting that value as a feature with the query.
Some features have parameters. It is always allowed to quote parameters with “. Nested quotes are not allowed and must be escaped using \. Parameters that can be parsed as feature names may be left unquoted. Examples: foo(bar(baz(5.5))), foo(“bar(\”baz(\\\”5.5\\\”)\”)”), foo(“need quote”)