Values.RecommendationDataSourceInformation about the recommendation.
type nonrec t = {recommendationId : RecommendationId.t option;The identifier of the recommendation.
*)document : Document.t option;The recommended document.
*)relevanceScore : RelevanceScore.t option;The relevance score of the recommendation.
*)relevanceLevel : RelevanceLevel.t option;The relevance level of the recommendation.
*)type_ : RecommendationType.t option;The type of recommendation.
*)data : DataSummary.t option;Summary of the recommended content.
*)}