flashlights
xml retrieval
documents usually have a content and a structure . the content refers to the text of the document whereas the structure refers to how a document is logically organized . an increasingly common way to encode the structure is through the use of a mark up language . nowadays the most widely used mark up language for representing structure is the extensible mark up language xml . xml can be used to provide a focused access to documents i.e. returning xml elements such as sections and paragraphs instead of whole documents in response to a query . such focused strategies are of particular benefit for information repositories containing long documents or documents covering a wide variety of topics where users are directed to the most relevant content within a document . the increased adoption of xml to represent a document structure requires the development of tools to effectively access documents marked up in xml . this book provides a detailed description of query languages indexing strategies ranking algorithms presentation scenarios developed to access xml documents . major advances in xml retrival were seen from 2002 as a result of inex the initiative for evaluation of xml retrieval . inex also described in this book provided test sets for evaluating xml retrieval effectiveness . many of the developments and results described in this book were investigated within inex . table of contents introduction basic xml concepts historical perspectives query languages indexing strategies ranking strategies presentation strategies evaluating xml retrieval effectiveness conclusions