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From "Alexander Klimetschek (JIRA)" <j...@apache.org>
Subject [jira] Created: (JCR-2797) Xpath: pure descendant-or-self axis does not work
Date Wed, 20 Oct 2010 17:56:23 GMT
Xpath: pure descendant-or-self axis does not work
-------------------------------------------------

                 Key: JCR-2797
                 URL: https://issues.apache.org/jira/browse/JCR-2797
             Project: Jackrabbit Content Repository
          Issue Type: Bug
          Components: jackrabbit-core, xpath
            Reporter: Alexander Klimetschek


A pure descendant-or-self axis "//" does not work, albeit it is defined in JCR 1.0, section
6.6.4.6. Running this query

/jcr:root/content//

returns an error:

Encountered "$" at line 1, column 38. Was expecting one of: "or" ... "and" ... "div" ... "idiv"
... "mod" ... "*" ... "return" ... "to" ... "where" ... "intersect" ... "union" ... "except"
... ... ... "/" ... "//" ... "=" ... "is" ... "!=" ... "<=" ... "<<" ... ">="
... ">>" ... "eq" ... "ne" ... "gt" ... "ge" ... "lt" ... "le" ... "<" ... ">"
... "-" ... "+" ... "|" ... "[" ... ... ... ... ... "," ... ... ... for statement: for $v
in /jcr:root/content// return $v

It only works in combination with another location step, like /jcr:root/content//* or /jcr:root/content//test.
Tested this on a 2.2 snapshot, but I think it was actually never supported so far.

The use case comes up when searching for a property in a subtree of a certain node, where
you want to include a property on that node directly as well, eg. /jcr:root/content//[@my:prop
= 'value']

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