Abstract
This chapter focuses on a generic X-Query context, the Java context, and describes the proposed Java Community Process (JCP) standard X-Query for Java (XQJ). It reviews that the architecture of XQJ follows the architecture of Java Database Connectivity (JDBC), which in turn follows Open Database Connectivity (ODBC). X-Query has become more widely accepted, and it is expected from other languages—that is, other than SQL and Java to have APIs to X-Query, especially Microsoft's and DOT.NET. Since, the initial XQJ work provides an excellent template for X-Query APIs in other programming languages. SQL/XML and XQJ have both shown that it's possible to leverage a lot of existing work (in standards and in implementations) when defining X-Query APIs. The future looks bright. The chapter also discusses Alphabet-soup review, Open Database Connectivity (ODBC) and Java DataBase Connectivity (JDBC), Document Object Model (DOM), SAX (simple API for XML), StAX (the Streaming API for XML), JAXP(the Java API for XML Processing), and JAXB (the Java API for XML Binding) . This discussion also includes execution of a query, manipulation of XML data, and the role of metadata in finding out any particular data source and its contents while accessing a wide range of XML data sources.
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