KOffice currently understands some of the FOAF vocabulary (storing contact data), and the rdfical format (for events). There are a few ways to encode longitude and latitude in RDF. The current patch supports two of them, with optional linking to rdfical. This is one of the major strengths of RDF, you can say who, where and when and also link these things together so an event carries not only a time but its location information too.
The below video shows the new RDF docker in aciton. As you click on text that has associated RDF, the docker shows you the interesting information. Frodo and Sam are assoicated with both traditional contact data and a location. The items in the RDF docker let you import them into your system (into kaddressbook or korganizer) or export them to well known desktop formats like vcard and ical. Editing locations is done with Marble and there is only a minimal set of information for contacts and events currently. Note that mid way through when I edit an event, timezones are respected. If the RDF describes an event as being in Tokyo, that timezone offset from your current localtime is respected.
Towards the end of the video I show that contacts can be simply drag and dropped between koffice and kaddressbook. This also works for events to/from Evolution but I had some issues with korganizer for events. D&D makes KOffice and ODF quite a convenient format for transmitting semantic information to colleagues in a single, self describing file.
KOffice & RDF: Who, What, When, Where? from Ben Martin on Vimeo.
