Backpage feed class is used to generate the feed xml for backpage. I have hosted the backpage feed class in github public repository.
Example Back page feed
<?xml version="1.0" encoding="ISO-8859-1"?> <rss version="2.0" xmlns:backpage="http://www.backpage.com/rss/2.0"> <channel> <backpage:import user="YourEmail@Address.com" site="http://www.backpage.com" /> <item> <backpage:site>http://losangeles.backpage.com</backpage:site> <backpage:id>2420811</backpage:id> <backpage:since>2012-04-20+01:20</backpage:since> <backpage:category>RestaurantRetailJobs</backpage:category> <backpage:SourceUrl>http://YourDomain.com/jobs/waiter12.html</backpage:SourceUrl> <backpage:replyEmail>YourEmail@Address.com</backpage:replyEmail> <backpage:allowReplies>No</backpage:allowReplies> <backpage:region>Los Angeles</backpage:region> <backpage:country>United States</backpage:country> <title> Server Positions Available at Super Good Restaurant</title> <description> <![CDATA[Super Good Restaurant Restaurant, located at 27th Street is now accepting applications for friendly, energetic, highly motivated individuals who will thrive in a fast-paced, team- oriented environment. We are currently seeking professional, sophisticated servers. <br><br> *Competitive compensation: ($75-100 lunch; $100-150 dinner) consistently <br> *Full Health Benefits available upon hire <br><br> Please apply in person Monday through Friday between 3-4 pm. (27th and Park) Application will be followed by an interview with a manager, so please dress accordingly. <br><br> <a href="http://www.YourCompanyDomain.com " target="_blank"> http://www.YourCompanyDomain.com </a> ]]> </description> </item> </channel> </rss>