use cases

We want to allow private annotations on shared content

• seeAlso MultiUser

Solutions

Guiding idea: different spaces

• implemented via named graphs

for resources

• read
• write

for RdfModel

much harder to define

idea: everybody may write everthing - but maybe not read

• issue: we must track who writes what
• -> we must use named graphs per user

idea: use triple patterns to describe what may be returned by queries