#NEWLINE# def add_data( self , k , v ) : #NEWLINE# #INDENT# ' Add a field\n\n        Parameters\n        ----------\n        k : string\n            Field name\n        v : string\n            Field value\n        ' #NEWLINE# self . _fields [ self ] = v #NEWLINE# dp = Evidence . DatatypeProperty ( k , owner = self ) #NEWLINE# dp ( v )