I am trying to view a .rdf file extension.

This file can be opened with Oracle Reports Builder. Assuming it is an Oracle Report file

**************** **********   OPEN a .RDF FILE EXTENSION ********************

***************MIGRATE .RDF File to an usable Database like Access**********

This is file that has origins on database such Oracle . The structre is the same than a XML file.

The way I solved it was this:

1. Rename extension .rdf to .xml.
2. Create a new database in Access 2007 or higher
3. Used tool Import XML file (look for the directory containing XML file)
4. First import structure,
5. Review fields and asigning MEMO to fields with big content
6. Import again the same XML, but this time using APPEND option
7. Review ImportationErrors... and review the field that have troubles
8. If some field showed truncation, did this: set field with trunc. to MEMO type and then Empty all tables (including ImportationErrors table)
9. Repeat step 6 until Importation Errors had zero records
10. With Access you can process all tables you need or make relationship, and generate queries, views, reports, etc.
11. That's all

Now from Access you can migrate tables to database you need such SQL Server, MySQL, PostgreSQL, FoxPro, etc.

I hope this answer be usefull to another users needing migrate that kind of database to another.

Best regards.

Néstor