Open Journal project: 
Linking Everything to Everything: Journal Publishing Myth or Reality? 

Figure 6


Figure 6. Sequence of linked biology pages: a, unlinked PDF page; b, same page with links added by the link service via the project's PDF plug-ins; c, a single link can point at multiple destinations; d, following a link on 'embryo' to the Dictionary of Cell Biology, a remote resource (note how this resource also has links added to it by the link service, so although it is remote it can still be an integral element of the linked Open Journal)