description: This email address is associated with a [direct](http://wiki.directproject.org/Addressing+Specification) service.  This extension can only be used on contact points where the system = 'email'
package_name: hl7.fhir.us.core
derivation: constraint
name: USCoreDirectEmailExtension
type: Extension
elements:
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-direct'}
    index: 0
  valueBoolean: {type: boolean, index: 1}
package_version: 3.1.0
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/core/StructureDefinition/us-core-direct
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 3.1.0