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:zz: Why I reforwarded the Preflet piece
- To: zzdev@xxxxxxxxxx
- Subject: :zz: Why I reforwarded the Preflet piece
- From: Ted Nelson <ted@xxxxxxxxxx>
- Date: Sun, 01 Nov 1998 20:14:01 +0900
- Cc: ted@xxxxxxxxxxxxxx
- In-reply-to: <19981028153142.13926.qmail@xxxxxxxxxx>
- References: <Your message of "Wed, 28 Oct 1998 17:59:30 +0900." <18.104.22.168.19981028175930.00f848a0@xxxxxxxxxxxxxxxxxxx>
- Reply-to: zzdev@xxxxxxxxxx
I & Mark-Jason said:
>> See my paper on Preflets
So I sent it.
At 10:31 AM 10/28/98 -0500, you wrote:
>> This "conjoinment" may be a good term. I have
>> been noticing that you generally want new dimensions
>> in pairs in just this way,
>> d.inside / d.contents
>> d.mark / d.marklist (tells what cells are part of
>> "the same mark")
>That's what I was thinking. Any time someone is going to want to have
>a relationship that is one-to-many, they will need to do this.
>> "Transitive" means that ordering is important.
>Not exactly. Order can be important wihout being transitive.
> ---> d.ancestor
>Here you want --- links to express `ancestry'.
>A is the ancestor of B, and B is the ancestor of C.
>But it is transitive, so A is also the ancestor of C.
> ---> d.child
>Here you want --- links to express a parent-child relation.
>A is the parent of B, and B is the parent of C.
>But is is *not* transitive, so A is *not* the parent of C.
>The two pictures look exactly the same, so if ZZ is going to
>understand the difference between these two pictures, there will have
>to be an explanation somewhere else.
>> See my paper on Preflets
>> I think 1 and 3 come from somewhere else
>> (as you see, I'm no mathematician) and may not
>> have meaning or relevance. Hey, I'm open--
>I wrote them down because I ran into examples where they were
>Symmetric means that in A---B, A is related to B in the same way that
>B is related to A. If you hop A over B and make it B---A, the meaning
>does not change. Example: d.contents is symmetric. d.inside is not.
>If ZZ is going to do things like selecting and gathering cells
>automatically, it will have to understand something about the meaning
>of the structures you build. Symmetry and transitivity are both
>In an earlier message, I suggested that there could be an operation
>for automatically alphabetizing cells:
> ---> d.sex
> MALE -- Homer -- Bart -- Ned -- Barney -- Moe -- Snake
>You'd put the cursor on MALE, press the button, and the structure
> MALE -- Barney -- Bart -- Homer -- Moe -- Ned -- Snake
>In order to do this, ZZ must know that d.sex is symmetric and
>transitive. Otherwise it should give you a warning first, because
>what you are asking for makes no sense, and if you try to alphabetize
>in a dimesion that is not symmetric or transitive, you will change the
>meaning of the structure:
> ---> d.son
> Grandpa -- Dad -- Ted
> || Alphabetize
> Dad -- Grandpa -- Ted (ooops)
>> >There were a couple of others I thought of, but my notebook is
>> Uh-oh. You DEFINITELY are one of us.
>My notebook is now in the compuiter, so beware.
Theodor Holm Nelson, Visiting Professor of Environmental Information
Keio University, Shonan Fujisawa Campus, Fujisawa, Japan
Home Fax from USA: 011-81-466-46-7368 (If in Japan, 0466-46-7368)
Professorial home page http://www.sfc.keio.ac.jp/~ted/
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Quotation of the day, 98.11.01:
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