Nowadays, huge volumes of data are organized or exported in a tree-structured form.
Querying capabilities are provided through queries that are based on branching path …

We describe a framework called the Uni-Level Description (ULD) for accurately representing
information from a broad range of data models. The ULD extends previous meta-data-model …

Many Internet-based applications have adopted XML as the standard data exchange format.
These XML data are typically stored in its native form, thus creating the need to present XML …

XML is becoming the data exchange standard on the Internet. Previously proposed XML
query languages, such as XQuery, Quilt, YALT, Lorel, and XML-QL, lack schema definition of …

With the wide adoption of XML as a standard data representation and exchange format
querying XML documents becomes increasingly important. However relational database …

We present a physical algebra for the manipulation of XML in a database. We show how to
map logical algebra operators to this physical algebra. We also present several physical …

We present a system that aims at increasing the flexibility and accuracy of information
retrieval tasks in the World Wide Web. The system offers extended searching capabilities by …