Gracie Barra's Positional Hierarchy

I have a side project in mind. I'd like a way to automate or organize my training journal. Some key fields would include:

• Grips
• Steps
• Precursor techniques
• Chain techniques
• Applicable videos/references

One of the challenges is coming with a consistent naming convention for techniques. Judo has some consistency but BJJ really seems to be a bit of hodge podge with each instructor taking their own approach. GB's hierarchy might of some benefit:

• Rear mount
• Mount
• Knee on belly
• Side control
• Half mount
• Guard top/guard bottom
• Turtle top/turtle bottom
• Half guard bottom
• Side control bottom
• Knee on belly bottom
• Mount bottom
• Rear mount bottom

Of course, there are any number of other options here like x-guard, de la riva, 50/50, etc. Maybe these options could be lumped into "specials" since every taxonomy needs an "other" category.

Wikipedia's "wisdom of crowds" also has an interesting hierarchy:

• Clinching
• Takedowns
• Throws
• Sprawling
• Submission holds
• -- Joint locks
• -- -- Armlocks
• -- -- -- Americana
• -- -- -- Armbar
• -- -- -- Chicken wing
• -- -- -- Hammerlock
• -- -- Leglocks
• -- Chokeholds and strangles
• -- Clinch holds
• -- -- Bear hugs
• -- -- Collar ties
• -- -- Overhooks
• -- -- Pinch grip ties
• -- -- Underhooks
• -- Compression locks
• -- Pain compliance
• -- Pinning holds
• Securing/Controlling/Pinning techniques
• Escapes
• Turnovers
• Reversals/Sweeps

We could keep breaking this taxonomy down but there are some challenges. For example, is a crank a pain compliance technique or a joint lock? I suppose we would have to use user warrant to figure it out.