nl_tokens: Node constructor
pl_tokens: function Node ( document , elem ) { this . document = document ; this . elem = elem ; // precalculate these, since they in any case will be used this . _isRoot = elem . nodeType === 9 ; if ( this . _isRoot === <mask> ) { this . _tagName = elem . tagName . toLowerCase ( ) ; this . _isSingleton = NO_ENDING_TAG . indexOf ( this . _tagName ) !== - 1 ; } else { this . _tagName = '' ; this . _isSingleton = false ; } this . isChunked = false ; this . isContainer = false ; // allow node object to be reused document . elemCache . push ( elem ) ; document . nodeCache . push ( this ) ; }