Two lexical works have been used as basic references in this translation.
It is therefore important to observe that Reitzenstein's lexical parallel utterly breaks down.
The grammatical and lexical treatises of Hayyuj and Ibn Janah were also translated.
Thus the lexical argument of Reitzenstein breaks down at the decisive points.
All of these things are held to belong to the grammar of a language and to be grammatic methods, distinct from lexical elements.