what is a! and why we use it in expressions?

Question

a!

Stefan Helzle · Accepted Answer

The Appian documentation will help you with this question. 
 docs.appian.com/.../domain_prefixes.html

Harshit Bumb (Appyzie) · Answer

Hi there, 
 AFAIK, a! is used to precisely identify which function belongs to Appian and which functions do not (custom functions, expression rules, interfaces, decisions, etc). However, there are some functions that do not start with a! even after being Appian's native functions.

what is a! and why we use it in expressions?

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