# Documentation - conditionally required tags

**URL:** <https://forum.fixtrading.org/t/documentation-conditionally-required-tags/9446>\
**Category:** General Q&A\
**Tags:** 43-changes, xid\_168568, imported\
**Created:** [June 12, 2001, 7:21pm UTC](https://forum.fixtrading.org/t/documentation-conditionally-required-tags/9446 "2001-06-12T19:21:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![fplpo\_x](https://avatars.discourse-cdn.com/v4/letter/f/7ab992/32.png) [@fplpo\_x](https://forum.fixtrading.org/u/fplpo_x)\
**Post date:** [June 12, 2001, 7:21pm UTC](https://forum.fixtrading.org/t/documentation-conditionally-required-tags/9446/1 "2001-06-12T19:21:00Z")

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Imported from previous forum

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**Author:** ![fplpo\_x](https://avatars.discourse-cdn.com/v4/letter/f/7ab992/32.png) [@fplpo\_x](https://forum.fixtrading.org/u/fplpo_x)\
**Post date:** [June 12, 2001, 7:21pm UTC](https://forum.fixtrading.org/t/documentation-conditionally-required-tags/9446/2 "2001-06-12T19:21:00Z")

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[original email was from Donald Mendelson - [dmendelson@capital-mkts.com](mailto:dmendelson@capital-mkts.com) ]  
In the FIX message documentation, it’s really easy to miss fields that are conditionally required. For example, “Either CashOrderQty or OrderQty is required.”

It would be easier if the “Req’d” column had three values:  
Y=required  
N=not required  
C=conditionally required

Don Mendelson  
[dmendelson@capital-mkts.com](mailto:dmendelson@capital-mkts.com)

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<div class="post-metadata">

**Author:** ![fplpo\_x](https://avatars.discourse-cdn.com/v4/letter/f/7ab992/32.png) [@fplpo\_x](https://forum.fixtrading.org/u/fplpo_x)\
**Post date:** [June 28, 2001, 8:40am UTC](https://forum.fixtrading.org/t/documentation-conditionally-required-tags/9446/3 "2001-06-28T08:40:00Z")

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[original email was from Chris Lambert - [chris.lambert@emx.co.uk](mailto:chris.lambert@emx.co.uk) ]  
\> In the FIX message documentation, it’s really easy to miss fields that are conditionally required. For example, “Either CashOrderQty or OrderQty is required.”  
\>  
\> It would be easier if the “Req’d” column had three values:  
\> Y=required  
\> N=not required  
\> C=conditionally required

Even better if ‘C’ was ‘Cnn’, e.g. C23, linking to a table of rules (which might point to elsweheer in the Spec)