As adjectives the difference between declaratory and declarative
is that declaratory is serving to declare or explain while declarative is expressing truth.
declaratory
English
Adjective
(-)
Serving to declare or explain
declarative
English
Adjective
(-)
Expressing truth.
(computing, programming) That declares a construct.
Usage notes
In some linguistic models, "indicative" and "declarative" are synonyms. In others, the "declarative" mood and "interrogative" mood are distinct types of "indicative" moods.