I've been following this discussion with some interest. A couple of things spring to mind now: 1. This seems to be the first statement of a problem: "outline structure must be first-class data in shared (cooperative, distributed) environments." Maybe it's been said earlier and I've missed it though. 2. Rich Hickey's talks/videos on state, value and identity (with a nod to AN Whitehead) chime. Not sure if the specifics apply but the approach is interesting. I'd like to have a slightly more informed input to this. Edward, what can you recommend by way of reading/coding for the current Leo data structures?
Best regards, Eoin On Dec 20, 2:36 pm, "Edward K. Ream" <[email protected]> wrote: > On Mon, Dec 19, 2011 at 11:59 AM, Edward K. Ream <[email protected]> wrote: > > > If all (or almost all) data appears in a Leonine sqlite db we can say > > the following: > > > - There is no need for a Leo cache. > > - There is no need for private @shadow files. > > - We can use the @shadow algorithm for *all* files, including @file, > > @auto, etc. > > Wrong, wrong, wrong. > > @shadow will *never* be the model for most files because it demotes > structure info to second-class status, namely, personal preference > grafted on to the "real" data. But the *essence* of Leo is that > structure is first-class data. > > @shadow is fine for non-cooperative (private) environments. In that > case, the "preference" structure is, in fact, the only structure there > is. But in shared environments outline structure must be part of each > external file. Thus, sentinels are, in general, essential as well. > > This must be the fourth or fifth time I have rediscovered this basic > principle. In the past, the emphasis has been mostly on sentinels, > but here we see that the underlying principle is that outline > structure must be first-class data in shared (cooperative, > distributed) environments. So this is progress of a sort. > > As a direct consequence, any approach that abandons sentinels must be > rejected. I don't know, in detail, this affects the current > discussion, but I think Seth and Hans have ideas that are compatible > with this principle. > > Edward -- You received this message because you are subscribed to the Google Groups "leo-editor" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/leo-editor?hl=en.
