dbXML - Native XML Database
dbXML is a Native XML Database. It is capable of storing and indexing collections of XML documents in both native and mapped forms for highly efficient querying, transformation, and retrieval. In addition to these capabilities, the server may also be extended to provide business logic in the form of scripts, classes and triggers.
The version 2.0 is in Beta phase but you can apply to be a Beta tester on their site
The version 2.0 is in Beta phase but you can apply to be a Beta tester on their site