Select 'New Table' from the 'Tables' menu:
to get the 'Define Data Stream' window:
You can now define a data source by associating the file or URL containing the data with the schema for that data.
If your data is in a file, click on the 'Select' button to the right of 'Key:'. This will open the File select box:
Select the file containing your data. Once you've selected the data file, the File select box will automatically be shown again in order for you to select the schema file. Select the schema file you just defined (the filename will be the same as the schema name you specified).
If you want the display name of the data source to be different from the data file name, change it now. Then click 'OK'.
If your data is accessed via a URL, change the data source type from 'UNIXFILE' to 'WWW'. The rest of the procedure is basically the same, except that instead of selecting the data with the File select box, you must manually enter the URL in the Info/Command area of the 'Define Data Stream' window.