Norbert
Fuhr, Jaap Kamps, Mounia Lalmas, Saadia Malik, Andrew Trotman
This paper gives
an overview of the INEX 2007 Ad Hoc Track. The main purpose of the Ad Hoc Track
was to investigate the value of the internal document structure (as provided by
the XML markup) for retrieving relevant information. For this reason, the
retrieval results were liberalized to arbitrary passages and measures were
chosen to fairly compare systems retrieving elements, ranges of elements, and
arbitrary passages. The INEX 2007 Ad Hoc Track featured three tasks: For the
Focused Task a ranked-list of non-overlapping results (elements or passages)
was needed. For the Relevant in Context Task non-overlapping results (elements
or passages) were returned grouped by the article from which they came. For the
Best in Context Task a single starting point (element start tag or passage
start) for each article was needed. We discuss the results for the three tasks,
examine the relative effectiveness of element and passage retrieval. This is
examined in the context of content only (CO, or Keyword) search as well as
content and structure (