Invoke Service Query¶

Definition¶

<invoke_service_query type="wh_question" predicate="p"/>

<invoke_service_query type="yn_question">
  <proposition predicate="p">
</invoke_service_query>

Calls for an query to be sent to a service.

Attribute	Type	Description
type	string	Optinal. Defaults to `wh_question`, but can be one of `wh_question` or `yn_question`.
predicate	string	Required if type="wh_question". This attribute specifies the predicate of the question sent to the service.

Parents¶

Children¶

<proposition>

Behaviour¶

An element calls for a query to be sent to a service, which (if successful) returns an answer.

The answer first becomes known to the system, and if the system knows the answer and the question is a goal question, this will trigger the system providing the answer to the user.

Examples¶

Invoke service query for getting the price of a trip.¶

<invoke_service_query type="wh_question" predicate="price"/>

Invoke service query for checking if a person needs a visa.¶

<invoke_service_query type="yn_question">
  <proposition predicate="need_visa"/>
</invoke_service_query>