X Yan, PS Yu, J Han - ACM Transactions on Database Systems (TODS), 2005 - dl.acm.org
Graphs have become increasingly important in modelling complicated structures and schemaless data such as chemical compounds, proteins, and XML documents. Given a …
R Schenkel, A Theobald… - … Conference on Data …, 2005 - ieeexplore.ieee.org
The HOPI index, a connection index for XML documents based on the concept of a 2-hop cover, provides space-and time-efficient reachability tests along the ancestor, descendant …
With the proliferation of XML data and applications on the Internet, efficient XML query processing techniques are in great demand. Answering queries using XML indexes is a …
H He, H Wang, J Yang, PS Yu - Proceedings of the 14th ACM …, 2005 - dl.acm.org
Testing reachability between nodes in a graph is a well-known problem with many important applications, including knowledge representation, program analysis, and more recently …
R Schenkel, A Theobald, G Weikum - Information Retrieval, 2005 - Springer
Query languages for XML such as XPath or XQuery support Boolean retrieval: a query result is a (possibly restructured) subset of XML elements or entire documents that satisfy the …
Some XML query processors operate on an internal representation of XML documents and can leverage neither the XML storage structure nor the possible access methods dedicated …
W Lian, N Mamoulis, DW Cheung… - IEEE transactions on …, 2005 - ieeexplore.ieee.org
Queries on semistructured data are hard to process due to the complex nature of the data and call for specialized techniques. Existing path-based indexes and query processing …