This paper discusses experiences and lessons learned from the design of an openhypermedia system, one that integrates applications and data not "owned" bythe hypermedia. The Dexter Hypertext Reference Model [8] was used as thebasis for the design. Though our experiences were generally positive, we foundthe model constraining in certain ways and underdeveloped in others. Forinstance, Dexter argues against dangling links, but we found several situationswhere permitting and supporting...