Name Requirements for Key Variables
This article describes the naming conventions used by the key variable in a key-value pair.
Naming Requirements for Keys
In Expression Builder, the name of a key variable in a key-value pair can consist of any number of digits followed by 1 (or more) letters, a dash, an underscore, and additional digits.
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Valid key names:
price123,123price,price-123,c_price123. -
Invalid key names:
123,price!123.
Prefixing Key Variables with c_
The c_ prefix is always required if the parameters that send in data on an event call URL use that syntax.
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