Databases are represented as cylinders. Cross-VOB hyperlinks, represented as solid bidirectional arrows, are drawn from the PVOB database to the databases of each of the three component VOBs. A dotted arrow points from the PVOB database to the Rational® ClearQuest® database, showing that the PVOB stores information from Rational ClearQuest fields in its database. A dotted arrow points to the PVOB database from the Rational ClearQuest database, showing that Rational ClearQuest stores information about the PVOB’s objects in its database. End of Figure 6.