[vos-d] parameterized views

[Karsten Otto]

Am 05.12.2006 um 13:41 schrieb Reed Hedges:

> Revision control is a good application where instanced views might  
> need
> to be added to the core VOS protocol in some.    I would love to be  
> able
> to use a URL to refer to a specific revision of a Vobject, and for a
> specific revision of a Vobject to refer to specific revisions of its
> children that were current at that parent Vobject revision (this is
> essential for meaningful revision browsing in hypertext).
>
I am a bit confused about the whole revision issue. The way you say  
it, it sounds as if only the state of child relations matters... but  
what about its type list, or its access control state? What about any  
*internal* state one of the metatype facets may have, and which is  
not exposed to the VOS graph structure at all? If you want to have a  
true snapshot of a Vobject, I don't see any other choice than to   
create a readonly clone at revision time, and keep that around  
indefinitely. Somewhat costly, isn't it?

Regards,
Karsten Otto (kao)