public Provenance addPolicy( String theUri) {

    if (myPolicy == null) {

      myPolicy = new java.util.ArrayList<UriDt>();

    }

    return this;

  }

     * </p>

   */

  public UriDt getReference() { 

    if (myReference == null) {

    }

    return myReference;

  }

     * Identity of participant. May be a logical or physical uri and maybe absolute or relative

     * </p>

   */

  public Agent setReference( String theUri) {

    return this;

  }

     * </p>

   */

  public UriDt getReference() { 

    if (myReference == null) {

    }

    return myReference;

  }

     * Identity of participant. May be a logical or physical uri and maybe absolute or relative

     * </p>

   */

  public Entity setReference( String theUri) {

    return this;

  }

     * </p>

   */

  public UriDt getEndpoint() { 

    if (myEndpoint == null) {

    }

    return myEndpoint;

  }

     * Identifies the routing target to send acknowledgements to.

     * </p>

   */

  public Source setEndpoint( String theUri) {

    return this;

  }

     * </p>

   */

  public UriDt getEndpoint() { 

    if (myEndpoint == null) {

    }

    return myEndpoint;

  }

     * Indicates where the message should be routed to.

     * </p>

   */

  public Destination setEndpoint( String theUri) {

    return this;

  }

     * Policy or plan the activity was defined by. Typically, a single activity may have multiple applicable policy documents, such as patient consent, guarantor funding, etc.

     * </p>

   */

  public UriDt addPolicy() {

    getPolicy().add(newType);

    return newType;

  }