Reference edition:

Prisciani Caesariensis Opuscula. Vol. II: Institutio de nomine et pronomine et verbo; Partitiones duodecim versuum Aeneidos principalium. Edizione critica a cura di M. Passalacqua, Roma, Edizioni di storia e letteratura, 1999, pp. 45-128. 

The Partitiones duodecim versuum Aeneidos is, like the Institutio de nomine, a didactic work that aligns itself with the tradition of epimerismoi, the grammatical analysis of the sentence that Greek students undertook in the second level of their scholastic curriculum. The grammarian Donatus is a fixed reference point in this work: on one occasion he is even raised to the level of auctor; but Priscian also mentions Apollonius, Didymus, and Herodian, as well as Charisius and Asper, and makes numerous references to his major work, the Institutiones. The Partitiones has a more complex structure than other comparable works presenting a metric ɛỉσαγωγή at the beginning, which was a constant in institutional manuals. However, this treatment ends with the examination of the first verse of Virgil's first book; thenceforward it examines the parts of speech in the first twelve verses of the respective books. Priscian’s choice of the Aeneid, the reference epic work of Rome, rather than the Iliad, the classic text for projects of this type, has a precise cultural and political significance and is well suited to Symmachean ideals of the Empire, which saw Greek-Latin syncretism as a fundamental element. The treatise, which contains connotations of a didactic dialogue between magister and discipulus — a preserved trait in nearly all ancient codices —, enjoyed a remarkable popularity in the medieval and Carolingian world. [M. Passalacqua, tr. C. Belanger]