[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XQuery Puzzle
Thanks. Does Andrews point above still hold though, that is, gotcha and div1 nodes are NOT siblings since they don't share a common parent ?? Fraser On 17/04/2008, Michael Kay <mike@s...> wrote: > > > Sorry for asking an XQuery question here, if there is a more > > appropriate forum please let me know. > > talk at x-query.com > > > > > Anyway, a question relating to this simple XQuery has been > > circulating on another group, but I am puzzled as to whether > > using // on a sequence is valid (see the return clause > > below). I tried in a couple of XQuery parsers (Saxon9 + the > > one built into XML Spy) and both return no results ?? > > > > let $set := ( > > <div1>one </div1>, > > <div1 class="doc">two </div1>, > > <div1>three </div1>, > > <div1 class="doc">four </div1>, > > <gotcha>START</gotcha>, > > <div1>five </div1> > > ) > > return $set//gotcha/preceding-sibling::div1[@class="doc"][1] > > This is actually an XPath question. This path expands to > > $set/descendant-or-self::node()/child::gotcha/preceding-sibling::div1[@class > ="doc"][1] > > Now, one of the elements in $set is a gotcha element, but none of them has a > child, or has a descendant with a child, named gotcha. Therefore the > expression selects nothing. > > You want $set/self::gotcha/.... > > Michael Kay > http://www.saxonica.com/ > >
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