<!-- DTD for the testfly.faa.gov XML Airport Status page, which is available at                  -->
<!-- http://testfly.faa.gov/flyfaa/xmlAirportStatus.jsp                                          -->
<!-- 2.2  12/16/13 Corrected spec for FCA_Data element (1 per CTOP) and added FCA element        -->
<!-- 2.2           FCA element quantity is 1 or more; FCA_Name added in FCA element              -->
<!-- 2.1  11/19/12 Moved the CTOP Avg to the CTOP element                                        -->
<!-- 2.0  11/12/12 Added CTOP as a Delay_type                                                    -->
<!-- 1.2  03/30/06 Lat and Long made into attributes of the Point and Center tags.               -->
<!-- 1.1  03/15/06 Added the Delay_type called Airspace_Flow_List per ETMS 8.2 AFP Requirements  -->
<!-- 1.0  06/09/03 Created                                                                       -->

<!ELEMENT AIRPORT_STATUS_INFORMATION (Update_Time, Dtd_File, Delay_type*)>
<!ELEMENT Delay_type (Name,(CTOP_List|Airport_Closure_List|Ground_Stop_List|Ground_Delay_List|Airspace_Flow_List|Arrival_Departure_Delay_List))>

<!ELEMENT CTOP_List                    (CTOP+)>
<!ELEMENT CTOP                         (Program_Name, Reason, CTOP_Start_Time, CTOP_End_Time, Avg, FCA_Data)>
<!ELEMENT FCA_Data                     (FCA+)>
<!ELEMENT FCA                          (FCA_Name, FCA_Start_DateTime, FCA_End_DateTime, (Line|Polygon|Circle), Floor, Ceiling)>

<!ELEMENT Airport_Closure_List         (Airport*)>
<!ELEMENT Airport                      (ARPT, Reason, Start, Reopen)>

<!ELEMENT Ground_Stop_List             (Program*)>
<!ELEMENT Program                      (ARPT, Reason, End_Time)>

<!ELEMENT Ground_Delay_List            (Ground_Delay*)>
<!ELEMENT Ground_Delay                 (ARPT, Reason, Avg, Max)>

<!ELEMENT Airspace_Flow_List           (Airspace_Flow*)>
<!ELEMENT Airspace_Flow                (CTL_Element, Reason, FCA_Start_DateTime, FCA_End_DateTime, AFP_StartTime, AFP_EndTime, (Line|Polygon|Circle), Avg, Floor, Ceiling)>

<!ELEMENT Line                         (Point,Point+)>
<!ELEMENT Polygon                      (PointsList)>
<!ELEMENT Circle                       (Center)>
<!ELEMENT PointsList                   (Point,Point+)>
<!ELEMENT Center                       EMPTY>
<!ELEMENT Point                        EMPTY>
<!ATTLIST Point Lat                    CDATA #REQUIRED>
<!ATTLIST Point Long                   CDATA #REQUIRED>
<!ATTLIST Center Lat                   CDATA #REQUIRED>
<!ATTLIST Center Long                  CDATA #REQUIRED>
<!ATTLIST Circle Radius                CDATA #REQUIRED>

<!ELEMENT Arrival_Departure_Delay_List (Delay*)>
<!ELEMENT Delay                        (ARPT, Reason, Arrival_Departure, Arrival_Departure?)>

<!ELEMENT Arrival_Departure            (Min, Max, Trend)>
<!ATTLIST Arrival_Departure Type       (Arrival|Departure) #REQUIRED>

<!ELEMENT Update_Time                  (#PCDATA)>
<!ELEMENT Dtd_File                     (#PCDATA)>

<!ELEMENT AFP_EndTime                  (#PCDATA)>
<!ELEMENT AFP_StartTime                (#PCDATA)>
<!ELEMENT ARPT                         (#PCDATA)>
<!ELEMENT Avg                          (#PCDATA)>
<!ELEMENT Ceiling                      (#PCDATA)>
<!ELEMENT CTL_Element                  (#PCDATA)>
<!ELEMENT CTOP_End_Time                (#PCDATA)>
<!ELEMENT CTOP_Start_Time              (#PCDATA)>
<!ELEMENT End_Time                     (#PCDATA)>
<!ELEMENT FCA_End_DateTime             (#PCDATA)>
<!ELEMENT FCA_Name                     (#PCDATA)>
<!ELEMENT FCA_Start_DateTime           (#PCDATA)>
<!ELEMENT Floor                        (#PCDATA)>
<!ELEMENT Max                          (#PCDATA)>
<!ELEMENT Min                          (#PCDATA)>
<!ELEMENT Name                         (#PCDATA)>
<!ELEMENT Program_Name                 (#PCDATA)>
<!ELEMENT Reason                       (#PCDATA)>
<!ELEMENT Reopen                       (#PCDATA)>
<!ELEMENT Start                        (#PCDATA)>
<!ELEMENT Trend                        (#PCDATA)>