The KDE desktop has taken the lead to bring the semantic desktop to users with their KDE 4.0 release. Although it had a rough start back then, IMHO Nepomuk always stood out as a major and remarkable service/technology.
- Nepomuk (What is an item about?): aims to provide the basis to handle all kinds of metadata on the KDE desktop in a generic fashion. This ranges from simple information such as tags or ratings over metadata extracted from files to metadata that is generated by applications automatically. The goal is to categorize all metadata using clean ontologies to make an automated handling and enrichment of the data possible. Some scenarios questions solved would be.
- Give me all songs by Michael Jackson
- Give me all files and contacts tagged with Work
- Zeitgeist (How do/did I use my items): is a service which logs the users's activities and events, anywhere from files opened to websites visited and conversations. It makes this information readily available for other applications to use. It is able to establish relationships between items based on similarity and usage patterns. Some scenarios questions solved would be:
- Give me the most listened to songs
- Give me recent/most used contacts sorted by location
- Give me most listened to songs by Michael Jackson
- Give me all recent contacts tagged with work that I contacted from home.
Basically since Zeitgeist only depends on gobject, dbus and sqlite and already uses the Nepomuk Ontology in combination with the Zeitgeist Ontology it works out of the box on KDE.
As for the work that will be done to get Zeitgeist and Nepomuk power in KDE for now:
- Have current service pass the info to Zeitgeist using an activity service
- Create a Zeitgeist extension to push counts and last timestamp for each document/contact/etc.
- Create a Journal plasma widget to view the user history.
It is nice to really have two techs coming together joining forces to take the user experience to a new level. Although a GNOME guy I was very welcomed by the KDE community, who are very open for cooperation in building better solutions.. Ivan Čukić and Lydia Pintscher have been very helpful and encouraging as well as the Kate and the Amarok crew. What I noticed here is that as a community they don't demand everybody taking things in their own hands but rather do things together. It is very much like the Ubuntu Community where I feel at home.
So if you want to know more hang out with us on #zeitgeist or #nepomuk-kde on freenode.