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https://issues.apache.org/jira/browse/JCR-2797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12923575#action_12923575
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Alexander Klimetschek commented on JCR-2797:
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Ok, // is actually /descendant-or-self::node()/, so this forces a child step at
the end, that's why //node() doesn't work.
Simply /jcr:root/content/descendant-or-self::node() should do it (afaiu the
Xpath 2.0 specification). For this Jackrabbit returns only the direct child
nodes of /content, but not /content itself nor any sub nodes below the children
(eg. /content/child/sub/child etc.).
> 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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