"In other words, You can either have a concrete API that has specific JavaScript syntax for each sensor's properties and events, or you can have a generic, dispatch-like API that is tied to a very specific ontology, vocabulary or list of acceptable values that can be used as parameters. Considering the vast range of sensors that might be included in the foreseeable future, the size of the API could be quite large and complex; alternatively, the API could be simple and the ontology could be complex." - Vlado Handziski