Is there a reliable way to link to a vignette or other overview document, which has been included in the "inst/doc" directory of a source package, within a package help file in Rd format? or maybe link to an index of such documents? David Professor David Firth Dept of Statistics University of Warwick Coventry CV4 7AL United Kingdom Voice: +44 (0)247 657 2581 Fax: +44 (0)247 652 4532 Web: http://www.warwick.ac.uk/go/dfirth