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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.
  • 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.