Interactive Broker market depth column descriptions

I am using IBrokers R API to collect IB market depth data (reqMktDepth(...) for ESU15, ES expired in Sep 15)

What is each column description? Especially column 3, 4 and 5. Please see the sample data below.

It seems,
1. Data
2. Time
3. ?
4. ?
5. ?
6. price?
7. volume?

Many thanks for your help

Ref:
https://cran.r-project.org/web/packages/IBrokers/IBrokers.pdf

The CSV data
20150728 00:00:24.155280,0,0,1,2062.25,568
20150728 00:00:24.194745,1,0,1,2062.00,470
20150728 00:00:24.195280,2,0,1,2061.75,1106
20150728 00:00:24.195647,3,0,1,2061.50,832
20150728 00:00:24.195994,4,0,1,2061.25,1096
20150728 00:00:24.196352,5,0,1,2061.00,1026
20150728 00:00:24.196688,6,0,1,2060.75,753
20150728 00:00:24.197032,7,0,1,2060.50,759
20150728 00:00:24.197359,8,0,1,2060.25,896
20150728 00:00:24.197700,9,0,1,2060.00,829
20150728 00:00:24.198037,0,0,0,2062.50,64
20150728 00:00:24.198360,1,0,0,2062.75,357
20150728 00:00:24.198718,2,0,0,2063.00,392
20150728 00:00:24.199057,3,0,0,2063.25,737
20150728 00:00:24.199379,4,0,0,2063.50,648
20150728 00:00:24.199710,5,0,0,2063.75,646
20150728 00:00:24.200029,6,0,0,2064.00,828
20150728 00:00:24.200361,7,0,0,2064.25,885
20150728 00:00:24.200704,8,0,0,2064.50,767
20150728 00:00:24.201022,9,0,0,2064.75,793
20150728 00:00:24.568122,9,2,1,0,0
20150728 00:00:24.568746,0,0,1,2062.50,4
20150728 00:00:24.569226,1,1,1,2062.25,538
20150728 00:00:24.569729,2,1,1,2062.00,467
20150728 00:00:24.570155,3,1,1,2061.75,1071
20150728 00:00:24.570583,4,1,1,2061.50,833
20150728 00:00:24.571085,5,1,1,2061.25,1070
20150728 00:00:24.571536,6,1,1,2061.00,950
20150728 00:00:24.572009,9,1,1,2060.25,895
20150728 00:00:24.572385,0,2,0,0,0
20150728 00:00:24.572754,9,0,0,2065.00,810
20150728 00:00:24.573178,0,1,0,2062.75,349
20150728 00:00:24.573579,1,1,0,2063.00,404

 

I contacted the API support, wait 5 minutes, got the answer.

1. Date
2. Time with micro second
3. Specifies the row Id of this market depth entry
4. Identifies how this order should be applied to the market depth. Valid values are:

• 0 = insert (insert this new order into the row identified by 'position')·
• 1 = update (update the existing order in the row identified by 'position')·
• 2 = delete (delete the existing order at the row identified by 'position')

5. Identifies the side of the book that this order belongs to. Valid values are:

• 0 = ask
• 1 = bid

6. The order price.
7. The order size.