Pinyin table list all pinyin symbol, its English letter for keyboard input, type(Initial-I, Finals-F, Unique PinYin rule-U), its sequence order in that type, and further we group them for beginner to memorize them.

It has the following fields :

Pinyin symbol  Text field Yes  
English letter  Text field Yes  
Type  Menu field I F or U
Group  Menu field No  
Audio  File field No  
Ordering  Number field No
Spelling_rule  Text field No

Pinyin symbol: ü
English letter: V
Type: F
Group: 1
Audio: Audio file (MP3) ü.mp3
Ordering: 6
Spelling_rule: YU without initial, ü and j、q、x、y spelled as ju(居)、qu(区)、xu(需)、yu(迂)。