SQL/XML, XQuery and XQJ

    Basics: XML Query Technology非常清楚地介绍了SQL/XML、XQuery和XQJ，值得初学者认真阅读。

参考文献：

1. DataDirect, Basics: XML Query Technology
2. DataDirect, DataDirect Connect for SQL/XML
3. ANSI/ISO, ANSI/ISO/IEC International Standard, Database Language SQL 2003
4. JCP, JSR 225: XQuery API for Java TM (XQJ)