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Managing XML data: Tag URIs
Uniform Resource Identifiers (URIs) can identify things without necessarily locating them. XML namespace URIs are the most obvious such use, but many others abound. When you use URIs primarily as identifiers, it's important to create URIs that are globally unique without implying that they reside on a particular server. Tag is a simple algorithm for creating unique, easy-to-remember URIs while avoiding conflicts. This has important implications for RDF, Atom, and other systems that use URIs as identifiers. 		Articles 24 Jan 2006  
 
Managing XML data: eXist -- an open source native XML database
As XML gains popularity, more and more users are finding themselves with a lot of XML documents to manage. Native XML databases are being developed to meet this obvious need. This article examines one such database, the open source eXist. eXist has the tools you need to manage data, and it benefits from broad API support -- but it's still in beta, and big performance and functionality holes need to be filled before it can be called solid. 		Articles 27 Jun 2005  
 
Managing XML data: Native XML databases
When your only tool is a hammer, everything looks like a nail. When your only tool is a relational database, everything looks like a table. Reality, however, is more complicated than that. Data often isn't tabular and can benefit from a tool that more closely fits its natural structure. When that data is XML, the appropriate tool for managing it might well be a native XML database. For many classes of applications with significant XML processing needs, a native XML database is a very powerful tool. Explore the nature of native XML databases and get some general ideas about what to expect from this new tool in the developer's toolbox. 		Articles 06 Jun 2005  
 
Managing XML data: Identify XML documents
The name of an XML file does not have to end in .xml. In fact, an XML document doesn’t have to be in a file at all. It can be a database record, a piece of a file, a transitory stream of bytes in memory that’s never written to disk, or a combination of several different files. However, many XML documents do reside on hard disks and other fixed media. When they do, it’s useful to be able to identify them quickly. This article summarizes the common file extensions and MIME media types that are used for XML documents. Sometimes, it’s just easier to go with the flow than to invent new conventions. 		Articles 29 Apr 2005  
 
Managing XML data: XML catalogs
An old programmer's adage states that any problem can be solved with an additional layer of indirection -- an adage that is as true in XML as in any other field. Many problems that arise when loading schemas, DTDs, and stylesheets can be elegantly solved by introducing XML catalogs as an indirection between the parser and the network loader. An XML catalog allows the document consumer to substitute one set of URLs for the actual URLs or public identifiers specified in the XML documents themselves. Doing so improves both the speed and the security of XML processing. 		Articles 13 May 2005  
 
Managing XML data: A look ahead
Much has been written about how to process XML documents, including how to search them with XPath, transform them with XSLT, style them with CSS, and create them with DOM. But as XML becomes increasingly popular and begins to pervade your systems (whether you want it to or not), a larger problem arises: How do you manage collections of XML documents? When you've got thousands, tens of thousands, or even millions of XML documents to hunt through, how do you find what you're looking for? How do you organize, index, search, store, serve, cross-reference, update, and otherwise manage medium-to-large collections of XML data? This column will attempt to provide useful answers to these questions. 		Articles 11 Apr 2005  
 
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