4.2.6 Probabilistic XML

documentation needed!

pxmlsup:val_except	(xs:string*, xs:string*) as xs:string*
pxmlsup:val_except	(xs:integer*, xs:integer*) as xs:integer*
pxmlsup:deep-equal	(node(), node()) as xs:boolean
pxmlsup:edit-distance	(xs:string, xs:string) as xs:integer