Michiel Hildebrand has begun a useful survey of Text-based Search on the Semantic Web, which actually is a broader survey of text search and indexing systems applied to this area.
The survey is a natural complement to those maintained, for example, by the W3C's ESW wiki or my own Sweet Tools.
The survey covers about 30 apps, fewer than in Sweet Tools, but with much greater detail in two tables including functionality, features, uses, search syntax supported, interfaces, paper references, applications, storage type and literal indexing engine.
[...] Text Systems and the Semantic Web WOW! If it ain’t here… (tags: SemWeb) Share and Enjoy:These icons link to social bookmarking sites where readers can share and discover new web pages. [...]