The examples in the database Adjective‑Adverb Interfaces in Romance (=aaif) are lemmatized and tagged according to a shared annotation model, using the same categories for different Romance languages and corpora. Thus, the annotation model offers a cross‑linguistic categorization based on the forms, functions and meanings of the heterogeneous and multifunctional word‑class adverb, which could also be applied to other languages besides Romance (e.g. for English). The following description of the tags and their definitions is an extensive repertoire of the possibilities offered by the aaif‑annotation tool and aims at a transparent and operational systematization.