Did anybody come across a reference doc that would list what is and what is not supported by the Jackrabbit XPath? I see the guys have got quite a backlog in their JIRA of “simple” things like the count() function, the position() function, half of the axes, etc.
Trying to do some advanced querying with XPath against a Jackrabbit repository now becomes trial and error process.
Jackrabbit supports everything mandated by JSR-170. Unfortunately there is no single document of what XPath query features are supported beyond of that. I usually look the features up from the source and from JIRA.