The Greenhopper in Jira allows hierarchy of versions(Parent- child relationships between versions). Setting up Version Hierarchy.
Does Jira or Greenhopper expose a web service Interface to get this hierarchy information? It seems that it is possible to get this information from the Jira database as shown here.
However, any pointers if any web service API is available for retrieving the hierarchy information.
That information isn't available through the APIs (and neither is the Version description) :(