--- title: component block – FIX 5.0 SP2 – FIX Dictionary – Onix Solutions description: component block – FIX 5.0 SP2 – FIX Dictionary – Onix Solutions --- ![Dictionary icon](https://www.onixs.biz/hubfs/SIC_website_2020/images/interface/img-icon-book.svg) # component block – FIX 5.0 SP2 – FIX Dictionary | Messages by MsgType \| Messages by Name \| Fields by Tag \| Fields by Name \| FIX 5.0 SP2 \| Home FIX 5.0 SP2 : component block Structure \| Used In Description The use of this component block is restricted to instrument definition only and is not permitted to contain transactional information. Only a specified subset of party roles will be supported within the InstrumentParty block. Possible uses of this block include identifying Listing Source information; Clearing Org information; Parent and Capital Structure information for F/Iixed Income and derivative instruments. Structure Tag Field Name Req'd Comments 1058 NoUndlyInstrumentParties N Repeating group below should contain unique combinations of InstrumentPartyID, InstrumentPartyIDSource, and InstrumentPartyRole => 1059 UnderlyingInstrumentPartyID N Used to identify party id related to instrument => 1060 UnderlyingInstrumentPartyIDSource N Used to identify source of instrument party id => 1061 UnderlyingInstrumentPartyRole N Used to identify the role of instrument party id => Component Block - N Repeating group of InstrumentParty sub-identifiers. Used In | | --- | | ![](https://www.onixs.biz/fix-dictionary/img/spacer.gif?height=5&name=spacer.gif) | - Follow OnixS - [Follow us on Twitter ](https://twitter.com/onixsbiz) - [Connect with us on LinkedIn ](https://www.linkedin.com/company/onix-solutions/) We track how people interact with our online web content and resources, and some of that tracking involves storing cookies on your device. By continuing to use our site you accept that you agree to this. For more details see our [Cookie usage, and Data Privacy and Protection Policies](https://www.onixs.biz/cookies-and-privacy.html). [Ok](https://www.onixs.biz/fix-dictionary/5.0.sp2/compblock_undlyinstrumentparties.html#) [OnixS ](https://www.onixs.biz/) Menu --- --- [OnixS ](https://www.onixs.biz/) ### Search the site Search