"Since Why is to be free text; Who is itemized free text; and When, Where, and Who are already well provided for with standards, our main attention turned to the problem of What. We looked enviously at the museum sector with their SPECTRE but we found no existing thesaurus for the categorization of our events. We had the choice of creating our own thesaurus, which we knew would be a tremendously time-consuming and wearying struggle, or come up with an alternative. The alternative was to create a living register of the naming conventions used by each SKI compliant site, open to all. This causes a bit of confusion for our target groups: The distinction between being a centralized database of all events and merely a registry of naming conventions takes some time to sink in."