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Content-oriented XML retrieval has been receiving increasing interest due to the widespread use of eXtensible Markup Language (XML), which is becoming a standard document format on the Web, in digital libraries, and publishing. By exploiting the enriched source of syntactic and semantic information that XML markup provides, XML information retrieval (IR) systems aim to implement a more focused retrieval strategy and return document components, so-called XML elements instead of complete documents in response to a user query. This focused retrieval approach is of particular bene't for...

These proceedings contain the refereed papers and posters presented at the S- ond International Conference on the Theory of Information Retrieval (ICTIR 2009), held at Microsoft Research in Cambridge, UK, September 10-11, 2009. This biennial international conference provides an opportunity for the p- sentation of the latest work describing theoretical advances in the ?eld of inf- mation retrieval (IR). The ?rst ICTIR was held in Budapest in October 2007, organizedby Keith van Rijsbergen, Sa ndor Dominich, S andor Daran yi, and F- enc Kiss. ICTIR was brought about by the growing interest in...