Table 2.
Comparison between existing PDC prototypes/systems.
| PDC prototypes | Data collection from services | Personal data storage | Semantics unification | Privacy and access control | Open API for personal data access | Personal data visualization | Supporting service collaboration |
|---|---|---|---|---|---|---|---|
| di.me | Automatic | File | Ontology | YES | NO | YES | NO |
| PCB | Semiautomatic | File | RDF & ontology | NO | YES | NO | NO |
| PCP | Automatic | N/A | N/A | YES | NO | NO | YES |
| PIM | Semiautomatic | File | Ontology | NO | NO | NO | NO |
| openPDS | Semiautomatic | File | N/A | YES | NO | YES | NO |
| PL | Automatic | File | Linked data | YES | NO | NO | NO |
| PC | Automatic | File | N/A | NO | YES | YES | NO |