[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Wath is the opposite of the union operator?
Thanks, that's go directly to my personal archive... On 9/22/05, Michael Kay <mike@xxxxxxxxxxxx> wrote: > > Subject: Wath is the opposite of the union operator? > > > > Or puting it in another way, how do i select a group of nodes selected > > by some xpath expression EXCEPT the ones that are selected by another > > xpath expression? > > The operation you are referring to is usually called "set difference". In > XPath 2.0, the operator is spelt "except". There is also a set intersection > operator spelt "intersect". There's no equivalent to these in XSLT 1.0, > though some processors support the EXSLT set:difference() and > set:intersection() functions. You can expensively code > > A except B => > > A[count(.|B) != count(B)] > > A intersect B => > > A[count(.|B) = count(B)] > > Michael Kay > http://www.saxonica.com/
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