Ars grammatica

An ars grammatica () is a generic or proper title for surveys of Latin grammar. The first "ars grammatica" seems to have been composed by Remmius Palaemon (first century CE), but is now lost. The most famous "ars grammatica" since late antiquity has been that composed by Donatus.
Extant works known as "Ars grammatica" have been written by
Donatus' "Ars Grammatica".
Two "artes grammaticae" circulate under the name Donatus. The first, the "Ars Minor", is a brief overview of the eight parts of speech: noun, pronoun, verb, adverb, participle, conjunction, preposition, and interjection ("nomen, pronomen, verbum, adverbium, participium, conjunctio, praepositio, interjectio"). The text is presented entirely in a question-and-answer format (e.g. "How many numbers does a noun have?" "Two: singular and plural."). 
Donatus' "Ars Major" is only a little longer, but on a much more elevated plane. It consists of a list of stylistic faults and graces, including tropes such as metaphor, synecdoche, allegory, and sarcasm. Donatus also includes schemes such as zeugma and anaphora.
Diomedes' "Ars Grammatica".
The "Ars Grammatica" or "De Oratione et Partibus Orationis et Vario Genere Metrorum libri III" by Diomedes Grammaticus is a Latin grammatical treatise. Diomedes probably wrote in the late 4th century AD. The treatise is dedicated to a certain Athanasius.
The third book on poetry is particularly valuable, containing extracts from Suetonius' "De poetica". This book contains one of the most complete lists of types of dactylic hexameters in antiquity, including the "teres versus", which may be the so-called golden line.
The "Ars" of Diomedes still exists in a complete form (although probably abridged). It was first published in a collection of Latin Grammarians printed at Venice by Nicolas Jenson in about 1476. The best edition of Diomedes's "Ars Grammatica" is in "Grammatici Latini" vol. I by Heinrich Keil.
Alcuin's "Ars Grammatica".
In around the 790s, Alcuin of York composed an "Ars grammatica" as the first of a group of four "opera didascalica" ('educational works') in question-and-answer form rooted in Donatus's "Ars grammatica". The other three texts were "De orthographia", "Ars rhetorica", and "De dialectica". Alcuin's "Ars grammatica" begins with a section "Disputatio de vera philosophia" ('dialogue on true philosophy'). In the assessment of Rita Copeland and Ineke Sluiter, 'the content of these works is highly derivative, but the pedagogy is innovative, and the way in which the work of compilation has been executed gives a new ideological twist to traditional material'.