BoostSpec

Specification to boost suggestions based on the condtion of the suggestion.

JSON representation 
{
  "conditionBoostSpecs": [
    {
      object (ConditionBoostSpec)
    }
  ]
}
Fields
conditionBoostSpecs[]

object (ConditionBoostSpec)

Condition boost specifications. If a suggestion matches multiple conditions in the specifictions, boost values from these specifications are all applied and combined in a non-linear way. Maximum number of specifications is 20.

Note: Currently only support language condition boost.

ConditionBoostSpec

Boost applies to suggestions which match a condition.

JSON representation 
{
  "condition": string,
  "boost": number
}
Fields
condition

string

An expression which specifies a boost condition. The syntax is the same as filter expression syntax. Currently, the only supported condition is a list of BCP-47 lang codes.

Example:

  • To boost suggestions in languages en or fr: (lang_code: ANY("en", "fr"))
boost

number

Strength of the boost, which should be in [-1, 1]. Negative boost means demotion. Default is 0.0.

Setting to 1.0 gives the suggestions a big promotion. However, it does not necessarily mean that the top result will be a boosted suggestion.

Setting to -1.0 gives the suggestions a big demotion. However, other suggestions that are relevant might still be shown.

Setting to 0.0 means no boost applied. The boosting condition is ignored.