I've seen people refer to fingerings in first, second, etc., position when discussing bass guitar. When I began playing, I worked out of the Simandl book for double bass which starts in half position using 1-2-4 fingering, and moves up the neck (I or first position, II, II/III, III, etc.). Is there a standardized set of positions for bass guitar? Who developed it and where can I learn more about it? Thanks.