Thanks a lot Alex!
Alexander Klimetschek wrote: > > On Mon, Nov 16, 2009 at 10:44, Oleg <[email protected]> wrote: >> What for brackets are allowed in the property constraints to separate >> logical operators? I want to build e.g. following query statement: >> >> //*[(@a = 'value1' and @b = 'value2' or @c = 'value3') and (@d = 'value4' >> or >> @e = 'value5')] >> >> Is the syntax with round brackets correct? > > Yes. > >> I known that AND has more >> strength than OR and some brackets are needed sometimes for the right >> query >> expression. Right? > > The operator precedence in XPath 1.0 is (from lowest to highest) is: > or, and, = / !=, <= / < / >= / > [1], hence your "a and b or c" > (shortened) will be interpreted like "(a and b) or c". > > Personally I always use brackets in any language to avoid any > mistakes. Leaving them out is just a convenience, after all. > > [1] http://www.w3.org/TR/xpath#NT-OrExpr > > Regards, > Alex > > -- > Alexander Klimetschek > [email protected] > > -- View this message in context: http://n4.nabble.com/Query-property-constraints-How-can-I-join-multiple-logical-operators-in-any-order-tp622036p622125.html Sent from the Jackrabbit - Users mailing list archive at Nabble.com.
