Subject: Re: LISP and AI
From: Erik Naggum <>
Date: 2000/05/04
Newsgroups: comp.lang.lisp
Message-ID: <>

* (Erann Gat)
| I presume that a browser history is an example of "this particular
| application" being "implemented by ... other means" but I don't see
| how having bidirectional links in HTML would add any functionality.

  The idea is not a "bidirectional links", but the bibliographic
  reference, which was a quite well developed concept prior to HTML.

  I wrote: "The ability of one document to introduce a link between
  two other documents'.  This is not a bidrectional link in the first
  place.  It's a third-party link if you want.  There is no anchor
  marked up as such in either of the documents involved, and the link
  is certainly not in the documents in question.  Instead, the anchors
  are described in the third document through various means of naming
  nested objects and the link between them is then established, with a
  purpose, such as a comment describing how the two anchor points

  HTML missed the opportunity (to put it mildly) to aid in locating
  and naming the structured, nested objects in a document, as well, so
  it's no wonder people can't really escape thinking about links and
  anchors _in_ the documents without spending some effort thinking
  about why it doesn't even make sense to predefine which words or
  ranges of text should be elevated to anchorhood.  After all, most of
  prefer to buy the marker pens separately from the books and color on
  our own, but with HTML, only pre-colored books are available.