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When working with API names for objects and fields they will often have suffixes such as __c and __x.

What suffixes are there and what do these API name suffixes indicate?

  • Do you mind if I convert this to [canonical-qa] and make both posts wikis? – Adrian Larson Mar 6 at 15:53
  • @AdrianLarson Sure. This question and answer can be changed to a wiki to help with future updates from the community. – Daniel Ballinger Mar 9 at 0:19
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This is the list I've compiled. Feel free to add any I've missed.

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    @Erik, thanks for adding the Person Account fields. – Daniel Ballinger Dec 8 '15 at 22:22
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    Well done. I would vote twice if I could. – pchittum Dec 8 '15 at 22:25
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    @Peter. Thanks. I was inspired by @metadaddy's and @jonbruce's BigObject presentation today. Which made me realize, I've missed __b! – Daniel Ballinger Dec 8 '15 at 23:06
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    __md was only used in a developer preview of custom metadata records-- it's no longer used (although __mdt for types is). – Avrom Roy-Faderman Dec 10 '15 at 16:08
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    @DanielBallinger This should probably be a Community Wiki. – zachelrath Dec 16 '15 at 15:29

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