+-----------------------+ +------------------+
| dso:DocumentService | | gr:Offering | +------------+
| +------------------+ | gr:includes | +--------------+ +----daia:providedBy---->| foaf:Agent |
| | dso:Presentation |<-----------------------+ Presentation | | +------------+
| +------------------+ | | +--------------+ | daia:availableFor +-----------|
| | | |<-----------------------+ frbr:Item |
| +------------------+ | gr:includes | +--------------+ | daia:unavailableFor +-----------+
| | dso:Loan |<-----------------------+ Loan | |
| +----------------- + | | +--------------+ |
+-----------------------+ +------------------+