Figure 3From: The BridgeDb framework: standardized access to gene, protein and metabolite identifier mapping servicesSimplified UML Diagram of the BridgeDb java library. The BridgeDb.connect method serves as an entry point, instantiating one of the many IDMapper implementations. The most important method of IDMapper is mapID, which takes an Xref object as argument. An Xref is a combination of an identifier String and a DataSource object, the latter representing an online biological database.Back to article page