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title: MDSubBookType <1173> field – FIX 5.0 SP1 – FIX Dictionary – Onix Solutions
description: MDSubBookType <1173> field – FIX 5.0 SP1 – FIX Dictionary – Onix Solutions
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# MDSubBookType <1173> field – FIX 5.0 SP1 – FIX Dictionary

| Messages by MsgType \| Messages by Name \| Fields by Tag \| Fields by Name \| FIX 5.0 SP1 \| Home FIX 5.0 SP1 : MDSubBookType <1173> field Type: int Used In Description Describes a class of sub book, e.g. for the separation of various lot types. The Sub Book Type indicates that the following Market Data Entries belong to a non-integrated Sub Book. Whenever provided the Sub Book must be used together with MDPriceLevel <1023> and MDEntryPositionNo <290> in order to sort the order properly. Values are bilaterally agreed. Used In <MDIncGrp> MarketDataSnapshotFullRefresh <W> |
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