Javi Nomenclature is a naming convention for twelve tone equal temperament non-cohemitonic heptatonic scales. In other words, Javi Nomenclature is naming convention for groups of seven notes which do not contain three consecutive piano keys.

Within this system, triads are represented by the consonants J, Q, V, and Z. The major triad is denoted with J, while its first and second inversions are with K and L. The diminished triad is denoted with Q, and its inversions are similarly given by R and S. The minor triad is denoted with V, and its inversions are similarly given by W and X. The augmented triad is denoted as Z. An octave is represented by O, a major seventh interval is represented by A, a minor seventh interval is represented by I, and a diminished seventh interval is represented by U.

Tetrachords are named by combining a triad with a seventh interval. By default, the consonant is the first letter, and the vowel is the second. An inverted tetrachord is denoting by reversing the order of the letters, so the vowel is first and the consonant is second. Scales are named according to a disyllabic code, in which the first syllable represents the 1-3-5-7 seventh chord of the first scale degree, and the second syllable represents the 1-3-5-7 seventh chord of the second scale degree.

The first five staves serve as a reference for the component naming system described above, while the next six pages document every possible non-cohemitonic heptatonic scale. Provided with each scale are the chords formed by producing the natural triad of each degree over the tonic. The scales are grouped into six families, each with seven modes.