The most common type of remote repository is a WebDAV repository. To connect to a WebDAV repository, you simply need to enter the WebDAV url that is provided by the repository owner. If necessary, you can enter a username/password if it is password protected. The most common case for ERGO WebDAV repositories is that the data is publicly accessible for reading without a password, but a username/password must be supplied for writing to the repository.
To create a WebDAV repository, you will need to set up a WebDAV server, which is beyond the scope of this article. Once it is set up, you can provide a URL to the webDAV root, or a subfolder in webDAV, where you'd like the repository to live. (Please note that if you allow un-authenticated write access, you expose yourself to possible abuse from 3rd parties on the internet.) Because you can set up subfolders as their own Ergo repository, it is possible to have multiple different Ergo repositories on a single WebDAV server.
You may also connect to special repositories that are hosted by Posgresql databases with the PostGIS extension. This allows for some advanced behavior, just as geospacial querying. Setting up a postGIS repository is a relatively complicated procedure, and beyond the scope of this document.