nl_tokens: extracts the property value out of an itemprop DOM node
pl_tokens: function parsePropertyValue ( node ) { var $node = $ ( node ) ; if ( $node . is ( 'meta' ) ) { return resolveAttribute ( $node , 'content' ) ; } else if ( $node . is ( 'audio,embed,iframe,img,source,track,video' ) ) { return resolveUrlAttribute ( $node , 'src' ) ; } else if ( $node . is ( 'a,area,link' ) ) { return resolveUrlAttribute ( $node , 'href' ) ; } else if ( $node . is ( 'object' ) ) { return resolveUrlAttribute ( $node , 'data' ) ; } else if ( $node . is ( 'data,meter' ) ) { return resolveAttribute ( $node , 'value' ) ; } else if ( $node . is ( 'time' ) ) { return resolveAttribute ( $node , 'datetime' ) ; } else { var text = $node . <mask> ( ) ; return text || '' ; } }