referential

Concise Oxford English Dictionary © 2008 Oxford University Press:
referential/-ˈrɛnʃ(ə)l/

▶adjective

• 1 containing or of the nature of a reference or references.

• 2 Linguistics relating to a referent, in particular having the external world rather than a text or language as a referent.

– derivatives
referentiality noun,
referentially adverb.