Kreeo is an interesting Bangalore based startup working on sematics based knowledge management.

Their goal is to create a platform where users can discover new knowledge, share their knowledge and collectively harness the knowledge gained from the social interaction. They have created a web based platform that can truly be called "of the people, by the people, for the people", which fulfills latent needs of knowledge and gaining from it, where people empower themselves and technology just enables.

They see their users as the key co-creators of value and their core purpose is "To empower netizens with a platform that is driven by them and enables them to have collective and smart learning, market themselves as professionals, and express themselves as global citizens. All Their endeavors will be focused on providing you with the best of web technology and a platform that empowers you to act and express yourself as a "global citizen" and knowledge professional.

In Kreeo, the core concept revolves around a BOK - aka, a Body Of Knowledge. The BOK framework is simply a set of predefined common terms. Each BOK item is a knowledge item. Kreeo is definitely a promising startup with some great technology. However, getting new, quality knowledge on the site will remain a challenge. Companies like Mahalo, Wikia, which fall in the similar domain are well funded and have some accomplished entrepreneurs behind them.