In earlier examples we used the nml:parameter to denote minor parameters which may slightly affect behaviour of logic of
 NML. These are:

• noReturnTraffic for links. A value of "True" means that there is no traffic from a source to a sink if the source and
 sink are grouped in a BidirectionalPort. See artf6542
• labelSwapping for SwitchingService. A value of "True" means that it is possible to create a NML Link from a Port with
 Label A to a Port with Label B, even if A ≠ B. See artf6513
• isReference for Network Objects. A value of "True" means that the object is defined elsewhere and is augmented here. 
See artf6583.

Proposal: Use the following syntax.

XML:
      <nml:parameter name="http://schemas.ogf.org/nml/2013/10/params#labelSwapping">false</nml:parameter>
      <nml:parameter name="http://schemas.ogf.org/nml/2013/10/params#noReturnTraffic">true</nml:parameter>

RDF:
  @prefix nmlparam: <http://schemas.ogf.org/nml/2013/10/params#>; .
  urn:ogf:network:example.net:2012:mynetworkobject   nmlparam:labelSwapping  "false" .
  urn:ogf:network:example.net:2012:mynetworkobject   nmlparam:noReturnTraffic  "true" .