Bind¶

Definition¶

<bind question_type="type" predicate="p">

The element defines a question that can be answered by the user, but will not be asked by the system.

Attribute	Type	Description
question_type	string	Optional. Defaults to `wh_question`, but can be one of `goal`, `wh_question`, `alt_question`, `yn_question` or `kpq`.
predicate	string	Optional. Required if question_type is `wh_question` or `yn_question`.
allow_binding_yn_answers	boolean	Optional. Only valid when `question_type` is `yn_question`. When true, yes/no answers can bind to this question. Using it on other question types raises a compile/parse error.

Parents¶

Children¶

<alt>
<embedded_question/> when question_type="kpq".

JSON format¶

{
  "bind": {
    "question": {
      "yn": { "proposition": { "predicate": "filthy_animal", "value": "dog" } }
    },
    "allow_binding_yn_answers": true
  }
}

Behaviour¶

The element defines a question that can be answered by the user, but will not be asked by the system, thereby `binding' that answer to the goal in question. This makes it possible to take into consideration optional and unrequested parameters.

This is only valid as long as the plan element is still in the plan. When executed, the plan element is removed from the plan. This means that the element should always be placed last in the plan, unless the developer wishes to remove the bind element during execution of the plan.

Examples¶

Binding a WH question about price range (e.g. in a travel booking application)¶

  <bind type="wh_question" predicate="price-class"/>