Hierarchical Indexing and Flexible Element Retrieval for Structured Document

As more and more structured documents, such as SGML or XML documents become available on the Web, there is a growing demand to develop effective structured document retrieval which exploits both content and hierarchical structure of documents and return document elements with appropriate granularity. Previous work on partial retrieval of structured document has limited applications due to the requirement of structured queries and restriction on sliding along the document structure according to queries. In this paper, we put forward a method for flexible element retrieval which can get relevant document elements with arbitrary granularity against natural language queries. The proposed techniques constitute a novel hierarchical index propagation and pruning mechanism and an algorithm of ranking document elements based on the hierarchical index. The experimental results show that our method significantly outperforms other existing methods. Our method also shows robustness to the long-stan...

• Type: Conference
• Year: 2003
• Where: ECIR
• Authors: Hang Cui, Ji-Rong Wen, Tat-Seng Chua
• Keywords: Document Elements, ECIR 2003, Information Technology, Structured Document, Structured Document Retrieval