For example, an XML markup called RSS (Rich Site Summary) is increasingly used to syndicate lists of uniform resource locators (URL's) representing news stories found on websites. RDF (Resource De- scription Framework) is an XML markup used to encapsulate meta data about content found at the end of URL's. TEI (Text Encoding Initiative) and TEILite are both an SGML and well as an XML markup used to explicitly give value to things found in literary works. Similarly, another XML language called DocBook is increasingly used to markup computer-related books or articles. The Open Archives Initiat- ive Protocol for Metadata Harvesting (OAI-PMH) uses XML to gather meta data about the content found at remote Internet sites.
As information professionals, it behooves us to learn how to exploit the capabilities of XML, because XML is a tool making it easy to unambiguously and as platform independently as possible communicate information in a globally networked environment. Isn't that what librarianship and information science is all about?