[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XQuery Puzzle
Is there any difference in the way that XPath 1.0 and 2.0 evaluate multiple predicates like this (there was a different result between some of the XQuery processors used and it wasn't clear whether these implemented XPath 1.0 or 2.0) ? Fraser. On 17/04/2008, Michael Kay <mike@s...> wrote: > > 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 ?? > > Yes, the expression was void on both counts - Andrew spotted one mistake, I > spotted another. > > Michael Kay > http://www.saxonica.com/ > > > > > 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/ > > > > > > > > > > ______________________________________________________________ > > _________ > > > > XML-DEV is a publicly archived, unmoderated list hosted by > > OASIS to support XML implementation and development. To > > minimize spam in the archives, you must subscribe before posting. > > > > [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ > > Or unsubscribe: xml-dev-unsubscribe@l... > > subscribe: xml-dev-subscribe@l... List archive: > > http://lists.xml.org/archives/xml-dev/ > > List Guidelines: http://www.oasis-open.org/maillists/guidelines.php > > > >
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