This is the schema for the UPnP Device Description document, in the RELAX NG Compact syntax.

# Relax NG schema for UPnP Device Description files.  See section 2.1 of UPnP
# Device Architecture 1.0 for the canonical reference.

default namespace = "urn:schemas-upnp-org:device-1-0"

start = root

root = element root {
   element specVersion {
      element major { text } &
      element minor { text }
   } &
   
   element URLBase { text }? &
   
   device
}

device = element device {
   element deviceType { text } &
   element friendlyName { text } &
   element manufacturer { text } &
   element manufacturerURL { text }? &
   element modelDescription { text }? &
   element modelName { text } &
   element modelNumber { text }? &
   element modelURL { text }? &
   element serialNumber { text }? &
   element UDN { text } &
   element UPC { text }? &
   
   element iconList {
      element icon {
         element mimetype { text } &
         element width { text } &
         element height { text } &
         element depth { text } &
         element url { text }
      }+
   }? &
   
   element serviceList {
      element service {
         element serviceType { text } &
         element serviceId { text } &
         element SCPDURL { text } &
         element controlURL { text } &
         element eventSubURL { text }
      }+
   }? &
   
   element deviceList {
      device+
   }? &
   
   element presentationURL { text }?
}+