code,message,sender,parameter_1,parameter_2,parameter_3,parameter_4
100,VERSION_SUPPORTED,executor,version,,,
101,WAITING_FOR_VERSION,executor,,,,
102,VERSION_ACCEPTED,process,version,,,
103,RELATION_START,executor,name,,,
104,INPUT_ATTRIBUTE_METADATA,executor,name,type,,
105,OUTPUT_ATTRIBUTE_ALIAS,executor,name,,,
106,OPTION,executor,name,type,value,
107,COMPLETION_REQUEST,executor,what,value,,
108,COMPLETION,process,value,,,
109,COMPLETION_END,process,,,,
110,WAITING_FOR_OUTPUT_ATTRIBUTES,executor,,,,
111,OUTPUT_ATTRIBUTE_METADATA,process,name,type,,
112,WAITING_FOR_RECORDS,process,,,,
113,INPUT_ATTRIBUTE,executor,index,value,isNull,
114,WAITING_FOR_OUTPUT_ATTRIBUTE,executor,,,,
115,OUTPUT_ATTRIBUTE,process,value,isNull,,
116,PROCESS_ERROR,process,code,message,,
117,EXECUTOR_ERROR,executor,code,message,,
118,EXECUTOR_WARNING,executor,code,message,,
119,RELATION_END,executor,,,,