On 26/02/14 16:42, Fredo Erxleben wrote: Yes. Units will most likely be represented by Wikidata entities at some point, similar to the globe or preferred calendar models, but the details are not known yet. For now, all entities in values are items, but having also properties and other things there is planned (having properties would make sense once claims on property pages are supported, to relate properties with each other). So it is ok to support only items for now, but an exception should be thrown if an unsupported type is encountered. Markus