AceWiki: A natural and expressive semantic wiki

We present AceWiki, a prototype of a new kind of semantic wiki using the controlled natural language Attempto Con-trolled English (ACE) for representing its content. ACE is a subset of English with a restricted grammar and a formal se-mantics. The use of ACE has two important advantages over existing semantic wikis. First, we can improve the usability and achieve a shallow learning curve. Second, ACE is more expressive than the formal languages of existing semantic wikis. Our evaluation shows that people who are not famil-iar with the formal foundations of the Semantic Web are able to deal with AceWiki after a very short learning phase and without the help of an expert