Relational ACL

Hi
Does anyone have any good links on implementing a relational ACL. I can
think of some fairly obvious implementations but i'd like to know...what i
dont know.
All the links i can find are all Netware/File System relevant. Many of the
principals carry over but i'd still like further info.
For instance, SAP is obviously ACL forms but what sort of implementation do
they use? Im particularly concerned about disk space. Using the methods i
can think of : for the average number of data objects im looking at * the
number of roles that can access them, an ACL implementation would require a
disk space footprint of about 20% the size of the actual data.
That seems like a lot of bloat to me. Is this normal? I haven't yet worked
thru performance implications. The application will typically sit in shared
hosting environment so in order to keep the cost down i want to minimise the
disk space footprint while selling the highly granular security features of
ACL's to potential customers.
TIA
IanWhich one dou you mean:
http://en.wikipedia.org/wiki/ACL
:)
ML|||Thanks but ive been there. The one good link that might have been is dead.
The rest as i say is posix linux filesystem.
Guess im just going to have to learn from my mistakes on this one.
"ML" <ML@.discussions.microsoft.com> wrote in message
news:8F114745-C0BF-43FD-82DB-FCD023708799@.microsoft.com...
> Which one dou you mean:
> http://en.wikipedia.org/wiki/ACL
> :)
>
> ML