Date: Wed, 24 Jun 92 12:00:50 EDT From: email@example.com (Jim Davis) Message-Id: <9206241600.AA13167@willow.tc.cornell.edu> To: firstname.lastname@example.org Subject: Links that refer to a range of text, not just a point. In my last piece of mail (I hope they arrive in order) I tried to generalize replacement and expansion links. But this way of describing links presupposes that links have a range in the source document. You need this (or is this obvious?) e.g. because you must know whether an annotation applies to the entire document, a section, or just one word. Likewise for replacements, you need to know how much to replace. But as far as I know, in most (all?) hypertext systems, the origin and destination of links are points. Certainly this is true in WWW, e.g. The destination of a link is a position in a document, never a section of a document. On the other hand, in some sense WWW's Anchors do label a region of the origin, since the anchor has an explicit beginning and end. But then this raises another issue: does WWW allow anchors within anchors? I think not - in which case I could not use WWW anchors to both label a paragraph (e.g. for attaching an annotation) and a word within it (e.g. for definition). This worries me quite a bit. Nor can I attach multiple links to the same point (e.g. definitions of a word in multiple languages).