In this paper, we present a system to automatically generate RSS Feeds from HTML documents which include time-series information with date expressions (e.g., archives of weblogs, BBSs, chats, and mailing lists, update descriptions on a site page, announcements of events, and so on). Our system is based on extraction of date expressions, structure analysis of HTML documents, and title detection/generation from the contents.
In FOAF vocabulary, many kinds of relationships between people are deliberately simplified as "knows" relation. So far, there are several attempts to describe relationships between people. However, to strengthen the expressive power and at the same time to avoid confusion of many relationships, we have to make an ontological consideration in the first place. This paper makes some considerations on relationship between people, and based on that discussion we describe some proposals toward a new relationship vocabulary.