Aikido Grammar
	Aikido techniques have structure. I believe it is possible to decompose them into reusable elements and come up with a grammar for defining the set of all possible techniques. My purpose in pursuing this exercise is to see if I can discover regions in the large space of possible techniques that I have not tried. As a result of creating this grammar, I have been able to produce a dynamic technique builder application. Here is my current proposal for the grammar. I will refine it over time.   <aikido_technique> -> <attack><technique>   <attack> ->  empty handed <hold> | <weapon><blow> |                      empty handed <combination> | tanto <combination>   <weapon> -> empty handed | sword | jo | tanto   <hold> ->  <disposition><hold_type>   <disposition> -> standing | hanmi handachi | suwari waza   <hold_type> -> kate tori | ryo kate tori | katate tori | ryo katate tori | ai tori | morotetori |                     ushiro ryote tori | ushiro hiji tori | ushiro ryo kate tori | ushiro tekubi tori |                     ushiro tori (high) | ushiro tori (low)   <blow> -> <disposition><blow_type>   <blow_type> -> shomen uchi | yokomen uchi | men-tsuki | mune tsuki   <combination> -> empty handed <combination_type> | suwari waza <combination_type>   <combination_type> -> kate tori <blow_type> | katate tori <blow_type> | ai tori <blow_type>   <technique> -> <entrance><continuance><finish>|                          <entrance><continuance><kaishi waza><continuance><finish>   <entrance> -> omote | ura   |   irimi | tenkan   |   soto mawari | uchi mawari   <continuance> -> none | shiho continunace | fingers to shoulder |                    ikyo continuance | sankyo continuance | <continuance><entrance>   <kaishi waza> -> irimi reversal | tenkan reversal   <finish> -> <pojection> | <immobilization>   <projection> -> kote geishi | shiho nage | ude kimonage | kaiten nage |           juji nage | kokyo nage | mune kokyo nage |  tenchi nage |           aiki otoshi | sumi otoshi | ikyo projection | sankyo projection | sankyo nage |           koshinage (ikkyo) | koshinage (shiho) | koshinage (yoko) | koshinage (drop-lift) |           koshinage (inside shoulder) | koshinage (outside shoulder) |           iriminage (standard) | irminage (full enter) | iriminage (waist)      <immobilization> -> ikkyo | nikyo | nikyo | sankyo | yonkyo | gokyo | rokyo |           ni-sankyo | shiho-nage pin | kote geishi pin I am thinking about ways to turn this grammar into a computer program with images and animation to be used as an aid instruction. Here is my first attempt. Please let me know if you see errors or omissions. I have created a page of all techniques from katate dori, and a page that shows all unique elements (mostly for debugging purposes).