Include the following text: "Identity is important to this IG because: When the identity of the person who is authenticated in a transaction is known with high confidence, as enumerated in this implementation guide, this information can be used in an access decision, e.g., Patient -Directed Exchange. This allows implementers to rely on user authentication in this workflow instead of probabilistic matching, which becomes increasingly convenient as federated identity services proliferate. This also reduces the number of credentials an individual needs to maintain.  As a secondary effect, digital credentials with high confidence identity assurance and a globally unique identifier associated with the individual, even in Business to Business matching (where the individual is not authenticated as being present in the transaction), emulate the perfect matching described in the paragraph above. Attempting to match on such a unique identifier is a preferred best practice over matching with a combination of demographics.  When identity proofing has been completed for an individual, the process of verifying that demographic attributes are consistent with a unique individual in the real world makes the attributes more meaningful in match requests and improves match quality when probabilistic matching must be used."