sow-historical-filter

Including the basic AMPS library:

using AMPS.Client;
using AMPS.Client.Message;
using AMPS.Client.Exceptions;

Constructing the command:

Command cmd = new Command(Message.Commands.SOW)
                  .setTopic(topic)
                  .setFilter(filter)

                  // AMPS bookmark or time specifier 
                  .setBookmark(point_in_time_specification)
              ;

The command can now be used in execute or executeAsync.