## 3.4 Summary

The online manuals integrate visualisation of XPCE's internal structure with a hyper-text system. This approach guarantees consistency between the documentation and the actual system and integrates overview and documentation of library and user-defined classes in one system.

The online manual tools provides various entry-points (classes, global objects, predicate overview, keywords, etc.) to obtain a list of card summaries. Cards may be opened from these summary lists to examine its contents.