<!ELEMENT rideset (uuid, version, zip_prefix, ride_type, 
   title, description, terrain, photos?, parking+, (turn|segment)+,
   stop*, poi*, ride+, history)>
<!ATTLIST rideset version CDATA #REQUIRED>
<!ATTLIST rideset xmlns CDATA #IMPLIED>
<!ELEMENT uuid (#PCDATA)>
<!ELEMENT version (#PCDATA)>
<!ELEMENT zip_prefix (#PCDATA)>
<!ELEMENT ride_type (#PCDATA)>
<!ELEMENT title (#PCDATA)>
<!ELEMENT terrain (#PCDATA)>

<!ELEMENT description ANY>
<!ELEMENT p ANY>

<!ELEMENT photos (title, src, photo*)>
<!ELEMENT src (#PCDATA)>
<!ELEMENT photo (desc, href)>
<!ELEMENT desc (#PCDATA)>
<!ELEMENT href (#PCDATA)>

<!ELEMENT parking (description, lat, lon)>
<!ATTLIST parking id CDATA #REQUIRED>
<!ELEMENT lat (#PCDATA)>
<!ELEMENT lon (#PCDATA)>

<!ELEMENT turn (fromto, cue, comments)>
<!ATTLIST turn id CDATA #REQUIRED>
<!ELEMENT fromto (#PCDATA)>
<!ELEMENT cue (#PCDATA)>
<!ELEMENT comments (#PCDATA)>

<!ELEMENT segment (road, fromto, comments, 
  lanes, shoulder, traffic, speed, waypoint+)>
<!ATTLIST segment id CDATA #REQUIRED>
<!ELEMENT road (#PCDATA)>
<!ELEMENT lanes (#PCDATA)>
<!ELEMENT shoulder (#PCDATA)>
<!ELEMENT traffic (#PCDATA)>
<!ELEMENT speed (#PCDATA)>

<!ELEMENT waypoint (lat, lon, ele, usgs?)>
<!ATTLIST waypoint id CDATA #REQUIRED>
<!ATTLIST waypoint stop CDATA #IMPLIED >
<!ATTLIST waypoint poi CDATA #IMPLIED >
<!ELEMENT ele (#PCDATA)>
<!ELEMENT usgs (#PCDATA)>

<!ELEMENT stop (type, description, lat, lon)>
<!ATTLIST stop id CDATA #REQUIRED>
<!ELEMENT type (#PCDATA)>

<!ELEMENT poi (description, lat, lon)>
<!ATTLIST poi id CDATA #REQUIRED>

<!ELEMENT ride (description, parking_ref, (turn_ref, segment_ref)+)>
<!ATTLIST ride id CDATA #REQUIRED>
<!ELEMENT parking_ref EMPTY>
<!ATTLIST parking_ref id CDATA #REQUIRED>
<!ELEMENT turn_ref EMPTY>
<!ATTLIST turn_ref id CDATA #REQUIRED>
<!ELEMENT segment_ref EMPTY>
<!ATTLIST segment_ref id CDATA #REQUIRED>

<!ELEMENT history (update+)>
<!ELEMENT update (version, date, description)>
<!ELEMENT date (#PCDATA)>