def extract_child_criteria
      @entry.xpath("./*/cda:outboundRelationship[@typeCode='COMP']/cda:criteriaReference/cda:id",
                   HQMF2::Document::NAMESPACES).collect do |ref|
        Reference.new(ref).id
      end.compact
    end
def extract_child_criteria
      @entry.xpath("./*/cda:outboundRelationship[@typeCode='COMP']/cda:criteriaReference/cda:id",
                   HQMF2::Document::NAMESPACES).collect do |ref|
        Reference.new(ref).id
      end.compact
    end
Generate a list of child criterias