Struct BM25Config 

pub struct BM25Config {
    pub k1: f32,
    pub b: f32,
}

BM25 configuration parameters

These parameters control how BM25 scores documents:

• k1: Controls term frequency saturation (typical: 1.2-2.0)
• b: Controls document length normalization (typical: 0.75)

References

Robertson, S. E., & Zaragoza, H. (2009). The probabilistic relevance framework: BM25 and beyond.

Fields

k1: f32

k1 parameter: Controls term frequency saturation

Higher values give more weight to term frequency.

• k1 = 0: Binary (term present/absent)
• k1 = 1.2: Default, balanced
• k1 = 2.0: More emphasis on frequency

b: f32

b parameter: Controls document length normalization

Controls how much document length affects the score.

• b = 0: No length normalization
• b = 0.75: Default, balanced
• b = 1.0: Full length normalization

Trait Implementations

impl Clone for BM25Config

fn clone(&self) -> BM25Config

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BM25Config

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for BM25Config

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for BM25Config

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for BM25Config

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.