Glasgow IDOM Links related to Information Retrieval, thanks to Mark Sanderson. http://www.dcs.gla.ac.uk/idom/ir_resources/

XCDE - Xml Compressed Document Engine The XCDE Library is a native system to compress and index XML files. It uses inverted list and tagstruct to support proximity and structural queries. http://butirro.di.unipi.it/~ferrax/xcde/xcdelib.html