Wouldn't it be nice to have a Dokuwiki Chord Diagram plugin for guitar (or even for other fretted instruments too)?
The syntax could be very simple: A7:x-0-2-2-2-3
(See image below. And I can explain in more detail if someone is interested).
Or one could add more advanced optionality:
Add fingering (four fingers 1, 2, 3, and 4, or even thumb t) A7:x-0-2-2-2-3:x01112
Ideally, it would have syntax for chord tones too: A7:x-0-2-2-2-3:x01112:x-A-E-A-C#-G
Or even intervals
So thus the complete syntax could be something like this: A7:x-0-2-2-2-3:x01112:x-A-E-A-C#-G:x-1-5-1-3-b7
Even chord names could be optional.
Fret numbers: should be from 1 to 23, or if difficult from 0 to f, that is fifteen frets, so as to be able to display all inversions of a chord on a string set.
Optional fingerings: From 1 to 4, or 1 to 4 and thumb T
Optional chord tone text.
Optional interval: 1, b2, 2, b3, 3, 4, #4, b5, #5, b6, 6, bb7, b7, 7, b9, 9, 10, 11, #11, b13, and 13. This could be a graphical challenge. A chord like Cm9(#11b13) would demand three characters pr interval. One idea could be to have them as alt-text, or make the diagram wider (bigger distance between strings.