What Do You Know About Databases And XML?

Dare Obasanjo writes: "XML has become a pervasive part of significant segments of software development in a relatively short time. From file formats to network protocols to programming langauges, the influence of XML has been felt. I have written an overview of XML schemas, XML querying languages, XML-Enabled databases and native XML databases. Below is a shortened version of the article." Obasanjo's original OODBMS article has been updated to reflect more of the disadvantages between picking an OODBMS over an RDBMS.