def start_replication_task(ReplicationTaskArn=None,
    StartReplicationTaskType=None, CdcStartTime=None):
    """
    Starts the replication task.
    For more information about AWS DMS tasks, see the AWS DMS user guide at Working with Migration Tasks
    See also: AWS API Documentation
    
    
    :example: response = client.start_replication_task(
        ReplicationTaskArn='string',
        StartReplicationTaskType='start-replication'|'resume-processing'|'reload-target',
        CdcStartTime=datetime(2015, 1, 1)
    )
    
    
    :type ReplicationTaskArn: string
    :param ReplicationTaskArn: [REQUIRED]
            The Amazon Resource Number (ARN) of the replication task to be started.
            

    :type StartReplicationTaskType: string
    :param StartReplicationTaskType: [REQUIRED]
            The type of replication task.
            

    :type CdcStartTime: datetime
    :param CdcStartTime: The start time for the Change Data Capture (CDC) operation.

    :rtype: dict
    :return: {
        'ReplicationTask': {
            'ReplicationTaskIdentifier': 'string',
            'SourceEndpointArn': 'string',
            'TargetEndpointArn': 'string',
            'ReplicationInstanceArn': 'string',
            'MigrationType': 'full-load'|'cdc'|'full-load-and-cdc',
            'TableMappings': 'string',
            'ReplicationTaskSettings': 'string',
            'Status': 'string',
            'LastFailureMessage': 'string',
            'StopReason': 'string',
            'ReplicationTaskCreationDate': datetime(2015, 1, 1),
            'ReplicationTaskStartDate': datetime(2015, 1, 1),
            'ReplicationTaskArn': 'string',
            'ReplicationTaskStats': {
                'FullLoadProgressPercent': 123,
                'ElapsedTimeMillis': 123,
                'TablesLoaded': 123,
                'TablesLoading': 123,
                'TablesQueued': 123,
                'TablesErrored': 123
            }
        }
    }
    
    
    :returns: 
    Must contain from 1 to 255 alphanumeric characters or hyphens.
    First character must be a letter.
    Cannot end with a hyphen or contain two consecutive hyphens.
    
    """
    pass
