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Where to find it: Settings → Tagging Rules → Create Tag Rule → Advanced Most people never need this. Advanced mode swaps the condition builder for a raw JSON expression box, for the few cases guided mode can’t express — nested filters, counting stops, indexed stops, and rules that predate the guided builder. Three differences worth knowing:
  • It saves exactly as written, as one rule, even when several record types are ticked. It doesn’t split the way guided mode does.
  • Quotes can only be targeted here. The Quote checkbox is hidden in guided mode.
  • The expression is validated on save, both for supported operators and for whether it can actually be evaluated.
An expression is a nested object of operator and operands. Each operand is either another expression or a typed value — reference reads a field off the record, literal is a fixed value to compare against:
Supported operators are and, or, ==, !=, >, <, >=, <=, contains, !contains, length, filter, join, and array.
and and or take exactly two operands. Three conditions have to be nested: and(and(A, B), C).
This is the easiest place to build a rule that quietly never matches anything. Email support@owlery.ai and we’ll help you write it.