opencog-dev team mailing list archive

["Joel Pitt" <joel.pitt@xxxxxxxxx>]

Okay, rethinking that...

Initially I thought there'd be set of dummy contexts, if there were
say 10 dummy contexts then each atom related to PLN could store 10
Versioned TruthValues. I.e the contexts would be the same for
different atoms.

The alternative is making EVERY TruthValue in PLN have a separate
context. Then the AtomTableWrapper in PLN would take the Handle of a
PLN context and convert this into the Handle of the actual atom and
the Version Handle.

At the moment the alternative is sounding less difficult, but also
much less efficient, since there are two additional atoms (a concept
node and a context link) for every PLN atom.

Thoughts?

J

On Wed, Aug 20, 2008 at 7:47 PM, Joel Pitt <joel.pitt@xxxxxxxxx> wrote:
> Hi Ari (and Novamente people),
>
> So I've implemented a fresh add that uses dummy Contexts. I'm now
> considering the best way to implement retrieval of version specific
> TruthValues, since one can no longer can simply use the Handle, as the
> VersionHandle is also needed to recall a specific TruthValue.
>
> My idea was to use a pair<Handle,VersionHandle> in place of Handle
> within the boost::variant Vertex. The tricky pointer/type distinction
> can still go on with the Handle part of the pair. I want to check
> first however before going ahead with it, since the Vertex variant is
> used within AtomSpace for an addAtom method and within AtomSpace
> utility files, so perhaps there are other things within Novamente that
> would be impacted if they are being ported to OpenCog?
>
> Cheers,
> J
>
> On Wed, Aug 20, 2008 at 5:54 AM, Ari Heljakka
> <ari.heljakka@xxxxxxxxxxxxxx> wrote:
>> Joel,
>>
>> once I finally got to the linking stage, MSVS finds 104 errors and then
>> crashes. It may be due to some of the very long template error messages.
>>
>> I used to compile novamente code without serious problems in spring 2007.
>> Perhaps the OpenCog has added some special extra complication there... I've
>> never seen anything like this with MSVS; I'm using the 2005 version.
>>
>> Anyway, since I'm not going to be helpful with the code anytime soon, I'll
>> prioritize giving you some of those screencasts regarding the most important
>> PLN classes.
>>
>> -A
>>
>> Joel Pitt wrote:
>>>
>>> Still working on compiling it? Sorry it's a pain :/
>>>
>>> In the BZR branch I've recently added a function stub to add atoms in
>>> dummy contexts and hopefully will get this done by the end of the
>>> week. I'm somewhat confident about what I have to do to allow the
>>> addition of atoms emulating fresh functionality, but a little hazy on
>>> how to provide the recall of those atoms since instead of handle
>>> they'll also need a version handle (or the index of the dummy context
>>> used).
>>>
>>> J
>>
>>
>