Finalized DTD file used by the xgen command line tool to generate a set of Java interfaces and classes that represent the document tree.

• By Kevin Wittmer
• October 16, 2000

<?xml version="1.0" encoding="UTF-8"?>

<!ELEMENT keplerian-elements (orbital-elements-description,
                              originator-name,
                              originator-location,
                              creation-date,
                              orbital-element*)>

<!ELEMENT orbital-elements-description (#PCDATA)>
<!ATTLIST orbital-elements-description format (nasa) #IMPLIED>
<!ELEMENT originator-name (#PCDATA)>
<!ELEMENT originator-location (#PCDATA)>
<!ELEMENT creation-date (#PCDATA)>
<!ELEMENT orbital-element (nasa-catalog-number,
                           element-set,
                           launch-information,
                           epoch-time,
                           inclination,
                           ra-of-node,
                           eccentricity,
                           arg-of-perigee,
                           mean-anomaly,
                           mean-motion,
                           decay-rate)>

<!ELEMENT nasa-catalog-number (#PCDATA)>
<!ELEMENT element-set (#PCDATA)>
<!ELEMENT launch-information (#PCDATA)>
<!ELEMENT epoch-time (#PCDATA)>
<!ELEMENT inclination (#PCDATA)>
<!ATTLIST inclination units (deg|rad) #IMPLIED>
<!ELEMENT ra-of-node (#PCDATA)>
<!ATTLIST ra-of-node units (deg|rad) #IMPLIED>
<!ELEMENT eccentricity (#PCDATA)>
<!ELEMENT arg-of-perigee (#PCDATA)>
<!ATTLIST arg-of-perigee units (deg|rad) #IMPLIED>
<!ELEMENT mean-anomaly (#PCDATA)>
<!ATTLIST mean-anomaly units (deg|rad) #IMPLIED>
<!ELEMENT mean-motion (#PCDATA)>
<!ATTLIST mean-motion units (rev_day) #IMPLIED>
<!ELEMENT decay-rate (#PCDATA)>
<!ATTLIST decay-rate units (rev_day_2) #IMPLIED>