The SIS defines a number of expressions, for use in macros, triggers, compositions, and interceptors.

Expressions can be composed using:

Unless otherwise stated, the parameters to all SIS expression conditions and functions can accept either:

  • a literal constant value — specified using its literal name as the value, for example:

    simple gt
    <greater-than a="10" b="5"/>
  • a variable value — specified by surrounding the variable name with ${…​}, for example:

    simple equal
     <equal a="${initial-dp.arg.service-key}" b="20"/>

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