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-
- ><!--
- >
- > I first posted this some weeks ago on the 'www-interest' list, and
- > received only one reply, (complementing me on my reference to Rexx.)
- >
- I keep my copy of this posting handy and I check lots of ideas against it.
-
- > I really had hoped that this post would start an interesting discussion
- > on the topics I address, specifically the ideas of 'attention links'
- > 'user documents' and 'transparent documents'.
- >
- I don't have any well defined systems (implementations or just specs.)
- that address these issues. WWW is headed in this direction, but it's
- a long way off.
-
- > Are these ideas so obvious that they merit no discussion whatsoever?
- >
- No, it's more like they're so novel we haven't thought seriously enough
- to comment yet.
-
- ><Query>
- >One of the missing pieces here is the ability of creating new h-texts, and
- >adding new links to old h-texts.
- >
- >Hypertext, and like systems, are of limited use if they do not support
- >collaboration. I feel that this is a VERY important point.
- >
- >When might we expect extensions to WWW that support collaboration?
- ></Query>
-
- You might look to Andrew for a more mature system in these regards.
- While I think Andrew is a great breeding ground for ideas, I think
- the resulting technology is too off-beat (for example, they implemented
- their own object-oriented C preprocessor, and now C++ has come along
- and writing Andrew code looks like a pain in comparison).
-
- I'm toying with the idea of a FrameMaker inset editor to interface
- Frame's direct-manipulation editing capabilities with global
- hypertext on the internet. I shouldn't even mention it until I have
- some sort of implementation, but it's an idea...
-
- >I have a few recommendations regarding new link types in WWW. This is based
- >on thinking about hyper-applications for almost 15 years, (ever since I
- >first had the pleasure of hearing Ted Nelson speak in 1977.)
- >
- >Please keep in mind that these are 'front end' issues. They should not
- >affect the manner in which documents are stored.
- >
- Well, we should be careful not to store documents in a way that
- conflicts with these useful concepts.
-
-
- >------------------
- >
- >There are 4 'minimal' link types which, I believe, a true hypertext applicatio
- n
- >*must* support.
- >
- > 1. Replacement
- > -- when activated, replaces the current document
- > with a new document, (this is what WWW offers
- > today).
- >
- FrameMaker: gotolink
- GNU Info: menus, notes
- WWW: <A HREF=...>
- EBT: link
-
- > 2. Annotation
- > -- when activated, overlays a new document on the
- > current document, partially obscuring the original.
- > (An annotation must be dismissed by the reader.)
- >
- FrameMaker: openlink
- GNU Info: n/a
- WWW: n/a
- EBT: link window=new
-
- > 3. Inclusion
- > -- when the document is created, elements from other
- > documents are collection to be included in the
- > representation of the current document. (Quotes)
- > (This is a non-interactive link. The user does
- > not activate this link. It is activated before
- > the document is presented to the user.)
- >
- FrameMaker: import by reference (bitmapped graphics ONLY)
- GNU Info: n/a
- WWW: n/a
- EBT: n/a
-
- > 4. Expansion
- > -- when activated, new information is added to the
- > current document, expanding the original scope.
- >
- FrameMaker: conditional text
- GNU Info: n/a
- WWW: n/a
- EBT: change stylesheets so that HIDE property changes
-
- >
- >There are 3 further types which I believe are necessary to complete the
- >function paradigm. (Of particular interest is the 'attention link'.)
- >
- >
- > 6. Execution
- >
- > -- when activated, some arbitrary function is performed
- .
- > The point that was mentioned about the lack of an
- > ubiquitious scripting language is well made. Lisp
- > is too arcane for most. Shell languages are too
- > platform specific. What is needed is a simple
- > to understand, freely available scripting platform.
- > Although I hesitate to mention it, REXX might be
- > a reasonable choice due to it's broad availability.
- >
- Ah... if you want commentary, state an arguable thesis. No one can argue
- against a platitude like "What is needed is a simple to undertand,
- freely available scripting platform." I vote for some brand of Lisp, perhaps
- XLisp or ELK.
-
- But there's a larger issue: should documents be turing machines? Using SGML,
- it is a well defined problem to determine whether a document is valid. As
- soon as we allow documents to be programs (like TeX, nroff, or Lisp), we
- run into the halting problem and we lose any hope of converting documents
- from one representation to another. If a document is a program that, when run,
- conveys its content, then we lose the ability to use that content in any
- other way than the author originally intended.
-
- > 5. Attention (a specialisation of the Execution type)
- >
- > -- when the current document is modified (a link is
- > added, or removed, or the document is merely read)
- > a message is sent to the 'owner' of the attention
- > link. This message creates a new link in the 'user
- > document' of the individual who placed the attention.
-
- Hmmm... I need a clear explanation of the underlying model here. In the
- model in my mind, a "document" is never modified. But the functionality
- you describe is interesting. Certainly we want to be able to collect
- usage statistics.
-
- > 7. Collection (a non-local specialisation of the Execution type)
- >
- > -- when activated, a collection link leaves the current
- > document, and 'travels' the docuverse, in search of
- > other documents which satisfy it's internal criteria.
- >
- > This is the concept of a 'knowbot'.
- >
- It looks like a query to me. I need either 1) a good definition of the
- capabilities of a knowbot, or 2) an implementation of a knowbot (any
- sort of hack will do) to get a feel for the functionality. Until
- then, it's just a very vague idea. Fortunately, there are some
- implementations of this idea: cron/find, WAIS, USENET news (kill files, etc.)
-
- >
- > Transparent Documents --
- >
- > a transparent document is one which a user creates locally,
- > and that is a new representation of an existing document.
- >
- > Transparent documents are used to create new local links on
- > a document which I do not have permission to modify.
- >
- > Transparent documents can then be made available to others,
- > (published) just as a "regular" document is, thus facilitating
- > the creation of new works from old.
- >
- This looks like a local copy of a document to me. No?
-
- > User Documents --
- >
- > a user document is where I keep my "bookmarks", links to
- > local documents, links to messages from others, links to
- > my "attention" links, (see below). User documents are where
- > we, as navigators of the docuverse, are defined as individuals.
- >
- > They are also where we can keep links to other user documents
- > which have been permitted to view/modify my own local documents
- .
- >
- > Another function of the User document is to collect users into
- > an abstract group. (Thus, based on my membership in user
- > document 'Research Group', I am permitted access to materials
- > 'owned' by that group. Of course, messages sent to an abstract
- > group then become available to all members of that group.)
- >
- > (Please note that a User Document is nothing more or less than
- > a collection of links, (as all documents are).)
- >
- Now we've opened up the whole PIM can of worms. Current implementations
- include mail user agents (MH, Elm), news readers (with their .newsrc and
- kill files, etc.) wais-questions, WWW home documents. I haven't looked
- at the hyperbole model, but I understand it addresses this issue at length.
-
- >So.....
- >
- > Scenerio:
- >
- I'd like to see how a MIME user agent would satisfy this scenario...
-
- > I start my session with my hypertext-application, and open
- > my user document.
- >
- I start my MIME UA.
-
- > I notice that 17 of my attention links have been activated
- > in the last day.
- >
- There are 17 mail messages (with certain tell-tale headers) in my inbox.
-
- > I select the most interesting and activate the link which
- > it created in my personal user document.
- >
- I read the message. It's a message/external-body type message that points
- to an article in a USENET database at this site.
-
- > I am now reading an article which I previously linked
- that is, I had saved the article by creating a message/external-body
- type message in my mail box.
-
- > , and
- > see that an annotation which I made some time ago
- i.e. my followup article
-
- > has been
- > added to, by a colleague.
- >
- i.e. has been followed-up.
-
- > The comments are pertinant to my current work, so I create
- > a new local 'transparent' document to mirror the original
- > work. (Or use the 'transparent' document I may have created
- > previously.)
- >
- I just save a reference to the news artile, as above, in a message/external-body
- type message.
-
- > On this new document, I make a few new annotations
-
- i.e. I follow up to the document. It would be nice to be able to do
- some direct-manipulation style annotation to articles, ala FrameMaker.
-
- > and decide
- > to made this new work available to the research group of which
- > I am leader. I place a link to it in the user document which
- > represents my working group.
- >
- I mail a message/external-body style reference to the thread to the
- alias that represents my working group.
-
- I really think that Internet Mail, Usenet News, and WAIS could be
- a great platform for CSCW. A MIME user agent that could make
- WAIS and NNTP queries and act as a FrameServer client would
- be a great start. If I have time, I'll try to cook something up.
-
- Dan
-
-