Solution : https://service.sap.com/sap/support/notes/733268 (SAP Service marketplace login required)
Key words :
-> downloads -> portal content studio, sap developer network, portal content catalog, content import functionality, tool 'pcd inspector', pcd supports objects, -called dangling links, content catalog, pcd inspector, pcd objects
Related Notes :
| 972495 | NW 7.10 Portal Export: references to GPAL objects |
| 733485 | EP6.0: Name clash during import of PCD objects on windows |
| 588913 | Central note for Import and Export for EP 6.0 |