Hi, Udayan.
Yes, other directory services, such as COS Naming or a machine's file system, are available.
For a
great discussion on JNDI, I would recommend downloading Ed Roman's book,
Mastering Enterprise JavaBeans at
the serverside.com. (In order to download the book, you will be required to register, but registering is free. Furthermore, you'll need Adobe Acrobat Reader to read the book.) Mr. Roman's wonderful discussion of JNDI, naming services and directory services can be found in Appendix B, "Understanding the
Java Naming and Directory Interface". This chapter should answer your question nicely.
To buy a copy of the book or view its errata, click
here.
Good luck, Udayan!
Art
