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From: Marcel Reutegger <marcel.reutegger@gmx.net>
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To: users@jackrabbit.apache.org
Subject: Re: XPath queries for versions
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Alexandru Popescu wrote:
> Considering a node:
> 
> /foo/bar/mynode with a property @my:property
> 
> I would like
> 
> 1/ to find the version of this node whose my:property was 'data':

//element(*, nt:frozenNode)[@my:property = 'data'
	and jcr:frozenUuid = '<the uuid of /foo/bar/mynode>']

please note that you need the uuid of the node in question, because the current 
path of a node in a workspace does not identify the node in the version storage. 
A version of a node can be checked out to any place in a workspace.

> 2/ to find a labeled version of mynode (label that I know)

//element(*, nt:versionLabels)/jcr:deref(@labelIKnow, '*')/*[jcr:frozenUuid = 
'<the uuid of /foo/bar/mynode>']

The query dereferences all nt:versionLabel nodes with a @labelIKnow reference 
property in the version storage. The target of the references are nt:version 
nodes and their children are the nt:frozenNodes with the versioned properties.

regards
  marcel