Exclusives are not so much a feature of Nicedoc per se, but a behavior exhibited by certain elements such as links and code.
exclusives are syntax that do not allow any formatting inside them.
In this sentence there is a [[link]].
In this sentence there is a Link test.
a [[link has no *internal* formatting]] that is effective.
a ERR_UNKNOWN(/app/pages/features/link has no *internal* formatting.nd) that is effective.
an `exclusive has no _internal_ formatting` that is effective.
an exclusive has no _internal_ formatting that is effective.
exclusives _can be `inside` outer-non-exclusives_.
exclusives can be inside outer-non-exclusives.