Chord Names issues

[GerhardH]

Hi !
If some is new to iRealPro (like me) the first surprise could be when looking at an example chord chart the first time.
Which standard does these chord names follow ? Especially this small triangle I hadn't seen before.
Does some kinda comparison lists exist ?
TIA
Gerhard

 

[pdxdjazz]

Answers:
https://forums.irealpro.com/threads/GLOSSARY-iReal-Pro.188/

https://forums.irealpro.com/threads/Chord-symbols.7485/

https://forums.irealpro.com/threads/Chord-amp-Triangle.938/
)BOB

 

[GerhardH]

Perfect ! THX !