d_plot</code> for making fretboard diagrams outside of the LilyPond tablature pipeline. This necessitates importing <code>ggplot2</code>.</li>
<li>Added functions for phrase validation, coercion and decomposition back to original character string inputs.</li>
<li>Added functions for note, pitch, chord and octave equivalence checks.</li>
<li>Added a collection of functions for constructing and working with common chords. The chord constructors are among the <code>chord_*</code>-named functions and also have 