As part of the J2EE specification, Sun is developing JSR-40, JMI. It looks like Oracle and Hyperion (they are apparently a big company in BI (business intelligence) and KM (knowledge management) http://www.kmworld.com/100.cfm) for OLAP and Data Mining.

The JMI specification defines a dynamic, platform-neutral infrastructure that enables the creation, storage, access, discovery, and exchange of metadata using Java interfaces. JMI is based on the Meta Object Facility (MOF) specification from the Object Management Group (OMG), an industry-endorsed standard for metadata management.

http://developer.java.sun.com/developer/technicalArticles/J2EE/JMI/

JSR 40 (JMI):
http://www.jcp.org/jsr/detail/40.jsp

JSR 73 (Data Mining API):
http://www.jcp.org/jsr/detail/73.jsp