nl_tokens: Some abstact API for the commanality matrix
pl_tokens: function CommanalityMatrix ( classlist ) { // space will identify a text node and/or an element node without any classnames this . rowKeys = { } ; this . rowNames = [ ] ; this . collumKeys = { } ; this . collumNames = [ ] ; this . nodeMatrix = [ ] ; this . summaryMatrix = [ ] ; this . <mask> = [ 0 , 0 ] ; this . bestIndex = [ - 1 , - 1 ] ; this . _bestNodes = { } ; }