As a repository of information and knowledge, because we can offer a comment. The exchange of knowledge in various subjects or questions to other people who are interested or there answers to help answer.
A corpus of knowledge We can propose and comment. Knowledge exchange Or ask questions on various subjects So people do not have the answers or the answers together.
A data warehouse knowledge, because we can offer and comments, knowledge exchange, or from questions on various matters. For other persons interested or have the answer to answer.