Freebase is an open database of the world’s information. It’s built by the community and for the community – free for anyone to query, contribute to, build applications on top of, or integrate into their websites.
OntoWiki facilitates the visual presentation of a knowledge base as an information map, with different views on instance data. It enables intuitive authoring of semantic content, with an inline editing mode for editing RDF content, similar to WYSIWIG for text documents.
This is a place for discussion and commentary on Martha Yee's article in Information Technology and Libraries (June 2009 - pp. 55-80). (The article is also available on the UC repository for those who do not have access to ITAL.)