[alicebot-archcomm] <set> tag, and clearing predicates

[Zayn Blore]

Sounds like a good idea.

Make a formal proposal with the tag/attributes and lets see if we can 
actually get it added to the spec.

This is debatable as numerous times it has been said that we are only Arch 
Comm members for one year before renewal.
So if that is correct, we shouldn't be.

But anyhow, forget that. It sounds like a good idea.
- Zayn

>From: "Jonathan Roewen" <consulatewizard@yahoo.co.nz>
>Reply-To: alicebot-archcomm@list.alicebot.org
>To: <alicebot-archcomm@list.alicebot.org>
>Subject: Re: [alicebot-archcomm] <set> tag, and clearing predicates
>Date: Tue, 10 Dec 2002 10:01:52 +1300
>
> > Just a quick note. I know this to be true for D, if a variable doesn't
> > exist or hasn't been filled and it called than it has a default value.
> > Most often the value is the string "undefined". Perhaps we should make
> > it know that in order for people to insure that their AIML is indeed
> > interpreter neutral they should not <set name="some name"></set> but
> > <set name="some name"><get name="standard value"/></set> where the
> > variable "standard value" is never set.
>
>Yes, and J-Alice achieves defaults using content of <get/>
>
> > Currently testing whether a variable exists or not is quite easy too.
> > One only needs to add the standard value and empty to a condition list
> > and all should work OK. I know this is quite a workaround and an extra
> > "exist=" to the condition would be quicker. But what would the result of
> > a condition be if it the variable didn't exist. Wouldn't it make more
> > sense if it were part of the <li>? Like <condition name=""><li
> > exist="false">answer</li>. This way you'd have an output if the variable
> > didn't exist.
>
><condition name="some-predicate" exists="false">
>...
></condition>
>
>would be equivalent to
>
><condition name="some-predicate">
><li exists="false">....</li>
></condition>
>
>I thought it would have been implied that it also applied to <li> as well,
>being that what is in an <li> can go in the <condition> if I'm not 
>mistaken.
>
>The main issue though is the need of a tag to properly clear a variable.
>I'll be introducing it to J-Alice in anycase .. I just think it should be
>standard, and part of the spec.
>
>Jon =)
>
>
>
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