We have installed ORACLE on a server. It is being used as the back end for an enterprise document management application.

I'm unsure if a repository has been setup on this server. How can I check this? currently the document management application works fine, so obviously it has not had any problems interacting with ORACLE. Does this imply that a repository has been setup?

The trouble that I'm having is that I'm unable to get into OEM. For what little I know there could be several reason, correct me here,
1. The repository has not been setup
2. Certain environment variables are missing

If I go ahead and create a repository, will it overwrite the old one, if one exists? I have to be careful since I don't want to disable the document management application.

Any good book suggestions for me are very welcomed!

Moshe Solomon