Index - I
| IndexedWriter | Common |
| Inner | Common |
| InnerEdge | PVGrammar |
| innerNotes | PVGrammar |
| insert | Internal.MultiSet |
| insertMany | Internal.MultiSet |
| isInner | Common |
| IsLast | Common |
| IsNote | PVGrammar.Parse |
| isRepetitionOnLeft | PVGrammar |
| isRepetitionOnRight | PVGrammar |
| isStart | Common |
| isStop | Common |
| itell | Common |
| Item | ChartParser |