Perhaps the most explosive technological trend over the past two years has been blogging. As a matter of fact, it's been reported that the number of blogs during that time has grown from 100,000 to 4.8 million-with no end to this growth in sight. What's the technology that makes blogging tick? The answer is RSS--a format that allows bloggers to offer XML-based feeds of their content. It's also the same technology that's incorporated into the websites of media outlets so they can offer material (headlines, links, articles, etc.) syndicated by other sites. As the main technology behind this...

The Resource Description Framework (RDF) is a structure for describing and interchanging metadata on the Web--anything from library catalogs and worldwide directories to bioinformatics, Mozilla internal data structures, and knowledge bases for artificial intelligence projects. RDF provides a consistent framework and syntax for describing and querying data, making it possible to share website descriptions more easily. RDF's capabilities, however, have long been shrouded by its reputation for complexity and a difficult family of specifications. Practical RDF breaks through this reputation with...

RSS is sprouting all over the Web, connecting weblogs and providing news feeds. Originally developed by Netscape in 1999, RSS (which can stand for RDF Site Summary, Rich Site Summary, or Really Simple Syndication) is an XML-based format that allows web developers to describe and syndicate web site content. Using RSS files allows developers to create a data feed that supplies headlines, links, and article summaries from a web site. Other sites can then incorporate them into their pages automatically. Although RSS is in widespread use, people struggle with its confusing and...