linking between chart to another WEBI doc without using opendocuemnt

Hi There,

      I want to create link from a chart to another WEBI document. I am in BOBJ 4.1, there is no 'document link' feature from chart. eventhough I think it can be retrieved by defining OpenDocument link. but I am wondering if this linking feature has already been implemented somewhare in BOBJ , which is more convenient thant opendocument.