All information is handled according to the official ITCH 5.0 documentation as found here: http://www.nasdaqtrader.com/content/technicalsupport/specifications/dataproducts/NQTVITCHSpecification.pdf
Details
msg_type
the type of the messagemsg_class
the group the message belongs tomsg_name
the official name of the messagedoc_nr
the number of the message in the documentation
Examples
get_msg_classes()
#> msg_type msg_class
#> <char> <char>
#> 1: S system_events
#> 2: R stock_directory
#> 3: H trading_status
#> 4: Y reg_sho
#> 5: L market_participant_states
#> 6: V mwcb
#> 7: W mwcb
#> 8: K ipo
#> 9: J luld
#> 10: h trading_status
#> 11: A orders
#> 12: F orders
#> 13: E modifications
#> 14: C modifications
#> 15: X modifications
#> 16: D modifications
#> 17: U modifications
#> 18: P trades
#> 19: Q trades
#> 20: B trades
#> 21: I noii
#> 22: N rpii
#> msg_type msg_class
#> msg_name doc_nr
#> <char> <char>
#> 1: System Event Message 4.1
#> 2: Stock Directory 4.2.1
#> 3: Stock Trading Action 4.2.2
#> 4: Reg SHO Restriction 4.2.3
#> 5: Market Participant Position 4.2.4
#> 6: MWCB Decline Level Message 4.2.5.1
#> 7: MWCB Status Message 4.2.5.2
#> 8: IPO Quoting Period Update 4.2.6
#> 9: LULD Auction Collar 4.2.7
#> 10: Operational Halt 4.2.8
#> 11: Add Order Message 4.3.1
#> 12: Add Order - MPID Attribution Message 4.3.2
#> 13: Order Executed Message 4.4.1
#> 14: Order Executed Message With Price Message 4.4.2
#> 15: Order Cancel Message 4.4.3
#> 16: Order Delete Message 4.4.4
#> 17: Order Replace Message 4.4.5
#> 18: Trade Message (Non-Cross) 4.5.1
#> 19: Cross Trade Message 4.5.2
#> 20: Broken Trade Message 4.5.3
#> 21: NOII Message 4.6
#> 22: Retail Interest Message 4.7
#> msg_name doc_nr