Sometimes “declarative” is also used to mean having the semantic property that syntactically declarative sentences often have, the property of making a truth claim.

The entire document be written in simple, declarative sentences. Having simplified the document, the Supreme Court should have reduced to five members.

Inversion is a sentence pattern that purposively disrupts the usual declarative form to achieve emphasis and better sentence transitions. It puts a prepositional phrase, adverbial phrase, adjectival ...

They imagine that any kind of sentence that might intuitively be used for exclaiming and/or ends with ‘!’ must belong, so they give examples like I can’t figure this out! (a declarative), or ...