Hi, This is for sure not useful at all, but I make the same mistake into PetitXml and PetitXPath (skipping the first element) :) in the Petit parsers, now it is fixed... you can try that or check it to fix the XPath parser (which I didn't know it exists, btw)
cheers, Esteban On May 8, 2013, at 11:23 PM, Herve Verjus <herve.ver...@univ-savoie.fr> wrote: > Dear All, > > I try a very simple example: > > mydoc.xml document: > > > <?xml version="1.0" encoding="UTF-8" ?> > > <first> > <second> > <item type="attvalue">nodevalue</item> > </second> > </first> > > > And the Pharo code found in the book.pharo-project.org: > > | doc results | > doc := XMLDOMParser parseFileNamed: 'mydoc.xml'. > results := ( XPath for: 'first' ) in: doc. > results explore > > > As a result, I obtain an empty OrderedCollection...It should contain an > element. Then a make some changes using different XPath expressions (i.e. > '/first/second/item/@type", etc.) but no way. > > Then I discover the first element of the XPath expression must not be the > root of the XML doc. If I change the mydoc.xml, introducing a new root > element: > > > <?xml version="1.0" encoding="UTF-8" ?> > > <foo> > <first> > <second> > <item type="attvalue">nodevalue</item> > </second> > </first> > </foo> > > Everything is ok (the same code as above). Here, XPath assumes that the first > tag we are looking for is not the root of the doc, otherwise it fails. I'm > not so sure but it seems that such implementation doesn't follow the XPath > specs. I tried another example from > http://www.w3schools.com/xpath/xpath_syntax.asp and same results: I obtain an > empty collection when using an XPath expression beginning with the > 'bookstore' tag, the root element of the doc: > > | doc results | > doc := XMLDOMParser parseFileNamed: 'books.xml'. > results := ( XPath for: '/bookstore' ) in: doc. > results explore > > Maybe, I missed something... > > Note: I have had to replace the isTag (deprecated) with isElement in some > piece of XPath code. > > Cheers, > > Herve >
