[cap-talk] capability-enabled spatial databases

[John Carlson]

Can someone list the capability-enabled spatial databases?  I am  
thinking stuff like Second Life, Open Croquet???, E-Monkey.  
Specifically, I am looking for the protocol which clients communicate  
with a database server.  I guess Second Life uses a form of XML, I'm  
not sure what either Open Croquet or E-Monkey use.  Would a typical  
spatial extension of SQL w/ SSL/TLS/PKI qualify to be a capability  
protocol, if it used swiss numbers for point, polygon, object,  
collection and class information and you couldn't manipulate the  
database (CRUD) without using a swiss number (specifying a single  
thing)?  I am thinking that there might be a local client cache  
database for stuff like scenery, and the server could update the  
client cache.  What's the best granularity to keep capability  
information at?  Point and polygon seem rather low level,  but it  
seems like you could easily enable them.

Does anyone have code for generating database IDs (say mysql) which  
are swiss numbers?

Thanks,

John