I don’t understand what the “parameterized” part means. In the Nos code we call them replaceable events.
Discussion
There’s parameterized and non-parameterized replaceable events. The former has a “d” tag that stays constant over replacements, which is useful when you can have multiple events of a given kind. The latter does not have the “d” tag, which means only one event for a given kind should exist, in theory.