Twitter is ideal for performing all kinds of useful programmatic projects. See how to create a RESTful data application around an XML database, and you will learn how to make the Twitter API work with virtual collections.

XQuery enables you to take advantage of the inherent structure of web pages to create easy-to-write and -maintain data extracts, a building block for new ad-hoc web applications called mashups.

Learn how to extract document semantics with Apache UIMA.

Although current databases limit XML processing to linear XPath or XQuery queries, existing hierarchical database techniques enable far more complex queries using standard SQL.

The XQuery language is the XML analogue of SQL, designed to augment XPath 2.0 by working with sets of values, not just with single scalar values.

For many common use cases, you can improve your XML-processing performance by taking advantage of XML-VTD's document-centric processing model.

Developers already familiar with JDBC will quickly become comfortable working with XML through XQJ.

Find out how to expose XQuery data integration services by invoking them through a Java servlet using a REST interface.

With the release of DB2 Viper, IBM has also announced the availability of the DB2 Developer Workbench. Formerly packaged with DB2 as the Development Center, the new Workbench, based on Eclipse, allows DBAs more flexibility in their development process and gives them a load of new toys to play with. This article walks through one of the new features: the XQuery Visual Builder.

In SQL Server 2005, XML becomes a first-class data type. Developers can make minor remote modifications to stored XML documents easily, taking advantage of new support for XML schema-based strong typing, and server-based XML data validation.

Developers are under increasing pressure to work with heterogeneous information. The advent of XML provided a data representation suitable for both regular (database tables) and irregular content, and was a significant step forward, but representation alone is not enough. We need a powerful standardized method for querying that data as well. XQuery fulfills that need.

Do you need to query semistructured data? Or maybe you just need another competency (a.k.a. buzzword) for your resume? XQuery can be both things and more, and it's coming with SQL Server 2005.

Yukon's new XML support features cut out the middleman and allow you to deal with your data directly on the database tier. Learn how to use these features to improve your database app's performance and design.

XQuery 1.0 still has to reach W3C Recommendation status, but the available implementations and technology previews show that it is a very potent query language.

XQuery is still a relatively new and unfamiliar XML-based language, but it offers many possibilities for simplifying tasks that today are difficult or tedious. These five practical scenarios should give you ideas for leveraging XQuery in your own applications.

Learning XML requires a basic understanding of WWW, HTML, and Web scripting languages such as JavaScript or VBScript. This list of articles will help get you started.

XML blurs the distinctions between databases, documents, and messages, but it needs a powerful and elegant query language to reach its full potential. XPath does not go far enough. XQuery intends to be that language.

Learn how to use XQuery's FLWR (for, let where, and return) expressions to process and restructure data from one or more documents.

The XQuery data model recognizes seven types of nodes. Learn how to take advantage of the data model in XQuery expressions

Learn to use XQuery conditional and quantified expressions to filter and select data, and to modify query results by including custom functions.