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                           History description 2014-03-26: Lock all vaue sets untouched since 2014-03-26 to trackingId 2014T1_2014_03_26
                         
                        description: 
                        
                        A code specifying whether and how the participant has attested his participation through
                           a signature and or whether such a signature is needed.
                         
                        
                        
                           Examples: A surgical Procedure act object (representing a procedure report) requires a signature
                           of the performing and responsible surgeon, and possibly other participants. (See also:
                           Participation.signatureText.)
                         
                        
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