signalID
signalID — Gives the internal identifier of a varDef [Deprecated]
Content model
signalID : 
     (#PCDATA)Description
      Used to specify the input or output varID. Now deprecated; reuse
      of varID is best practice.
    
Future plans for this element
      The signalID element has been deprecated with 2.0 in favor of
      the more consistent varID element and will be unsupported in a
      future release of this specification.