Create xml data feed from excel

Hi Need to create a xml feed for streeteasy.com. I have all my data in excel. i would need someone to create a excel sheet with the necessary fields in order for it to be compatible with [login to view URL] xml format. I would need to be able to update the xml through the excel sheet. Basically i would have an excel sheet with my data, as soon as theres any changes to the data i should be able to create a new xml and update it to [login to view URL] ## Deliverables this is the xml format: condo|coop|townhouse|condop|rental|house|other