Which subset of XPath is implemented in Jackrabbit?

[Uwe Sandner]

Hi,

The JSR170-1.0 Spec (section 6.6.6) says that only a subset of XPath
2.0 has to be implemented for JCR. Especially support for ForwardAxis
and ReverseAxis is not mandatory.

Example:

<a>
 <b>
   <c/>
 </b>
</a>

Query: "//b/ancestor::*"
Result: -- nothing
Expected result: <a>

I guess "ancestor" is not implemented by Jackrabbit  - or is my query wrong?

Is there a documentation which parts are implemented in Jackrabbit?

Thanks,
 Uwe