Metadata stores
The DISCUS project has always supported that intuition that annotation capabilities are a must for knowledge and information exchange. For instance, imaging that you are analyzing the KeyGraph generated from a particular discussion (here you can find an example). You may want to enrich such graph with your analysis, comments, or related information. Basically, you want to add metadata to the KeyGraph. If such a capability is available, a whole new bunch of information will need to be efficiently stored to allow, not only fast and easy retrieval, but allow analysis of the added metadata....