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+The oracle program creates the cockatrice card database and needs a set database to achieve this.
+The set database is written in XML and has the following skeleton:
+
+<?xml version="1.0" encoding="UTF-8"?>
+<cockatrice_setdatabase version="20100416">
+	<picture_url>http://www.wizards.com/global/images/magic/general/%1.jpg</picture_url>
+	<set_url>http://gatherer.wizards.com/Pages/Search/Default.aspx?output=spoiler&amp;method=text&amp;set=[&quot;!longname!&quot;]</set_url>
+
+	<set import="1">
+		<name>Set Code</name>
+		<longname>Set Name</longname>
+	</set>
+
+	<set import="1">
+		<name>Another Set Code</name>
+		<longname>Another Set Name</longname>
+	</set>
+
+	...
+
+</cockatrice_setdatabase>
+
+The full set database file called "set.xml" should be included in the cockatrice git-sources.
+
+* You could change the picture_url to another source if you want, e.g. if you have HQ scans or another alternative server.
+* The set_url is the search URL for Wizard's Gatherer, where the oracle program will fetch it's information from.
+* If the Gatherer changes, adapt the URL and keep in mind that '&', '"' and other special characters should be HTML encoded (like '&amp;' and '&quot;').
+* Further, the oracle replaces substrings included in '!' characters with information from the set entries, like '!longname!' with the set name.
+* If you add a new set to the database, you have to create a new set entry like
+	<set import="1">
+		<name>AVR</name>
+		<longname>Avacyn Restored</longname>
+	</set>
+and update the date in the version string. If you set import="1" the set's checkbox in the oracle's GUI will be set, otherwise unset.
+
+
+Here is a more detailed step by step manual found in the internet:
+
+1. Load the Oracle program that's installed with Cockatrice. The Oracle program can usually be found by click the Start button and going to All Programs > Cockatrice.
+2. Click the File menu item and select 'Download sets information...'
+3. Copy the URL from the 'Load sets' screen (the URL should be something like http://www.cockatrice.de/files/sets.xml) and paste it into your internet browser.
+4. Right click on the web page and select Save As
+5. Save the XML file to somewhere on your PC, preferably somewhere that's easy to get to
+6. Right click on the XML file and select 'Open With...' and choose Notepad from the list
+7. Before the end of the notepad document (should be something like </cockatrice_set database>) add:
+    <set import="1">
+	<name>RTR</name>
+	<longname>Return to Ravnica</longname>
+    </set>
+8. Save and close the XML file
+9. Back in the Oracle progam if the 'Load Sets' screen is still open click the Cancel button
+10. Click the File menu item and click 'Load Sets from File'
+11. Browse to where you saved the XML file and double click on it to select it
+12. Click the Start Download button
+13. Once the download is complete close the Oracle program and run Cockatrice. The Return to Ravnica cards should now be displayed.
+
+Hopefully the steps above are helpful and easy to follow.
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