Traditionally, when we think about subject-centric approach to organizing information, we have in mind equivalent of “master data” – main entities, their properties and relationships. This type of information is relatively static. Of course, subject-centric approach works well also for representing/organizing information about “transactions” and “events”.
“Master data” (PSIs for people, places, companies, products etc.) is a conceptual frame/”endoskeleton” of Ontopedia’s knowledge map. For example, http://psi.ontopedia.net/Apple_Inc is a core, “master” entity.
But Ontopedia’s knowledge map is not limited by this relatively static information. Ontopedia’s knowledge map also has PSIs for events, such as
“Master Data” combined with “Events” create amazingly powerful conceptual framework for mapping of our knowledge.
Ontopedia’s knowledge map has explicit concept of time and has focus on “current moment on Earth at human size level of (real) world” with recording of history and results of forecasting. History does not disappear in the knowledge map. For example, Ontopedia can “remember” that Apple Inc was called “Apple Computer Inc” at some point and that eMac was in Apple’s product line. History is available for referencing and continues to play an essential role in organizing information.
Explicit modeling of time helped us to introduce even more intriguing features such as Subject-centric micro-blogging.
We are experimenting with “dynamic” associations and properties such as Currently Reading [Person, Book], Currently Located At [Person, City], “Currently Thinking About [Person, Subject]”, “My favorite link of the day” etc.
To support this “dynamic” perspective on Ontopedia’s knowledge map, we recently added subject-centric RSS feeds. Each subject page in Ontopedia’s knowledge map has own RSS feed which provides quick access to all assertions about specific subject. Each assertion has associated time stamps which allow to track changes in the knowledge map and report them in RSS feeds.
In addition to traditional “source-centric” RSS feeds in my RSS aggregator, I have now folders like People, Companies, etc. with subject-centric RSS feeds from Ontopedia’s knowledge map. These feeds are available on my laptop, but I also have a synchronized RSS aggregator on my mobile phone. Mobile RSS aggregator and mobile browser allow me to work with Ontopedia’s knowledge map when I need it. It makes me feel like Subject-centric computing is (almost) here…