Go to Preferences -> Data Sources. In the Connections panel click the New button.
Enter a unique name for this connection and select one of the previously configured MarkLogic data sources from the Data Source combo box.
Fill-in the Connection Details:
The host name or ip address of the installed MarkLogic engine.
Oxygen uses XCC connector to interact with MarkLogic XDBC server and requires the basic authentication schema to be set. Starting with version MarkLogic 4.0 the default authentication method when you create a HTTP or WebDAV Server is digest, so make sure to change it to basic.
The port number of the MarkLogic engine.
User name to access the MarkLogic engine.
Password to access the MarkLogic engine.
The url used for browsing the MarkLogic database in the Data Source Explorer view. (optional)
Click OK.