1<!ELEMENT logs (trail|req_machine|req_date)+>
2<!ELEMENT req_machine (#PCDATA)>
3<!ELEMENT req_date (#PCDATA)>
4<!ELEMENT trail (log)+>
5<!ELEMENT log (log|sig)>
6<!ELEMENT sig (#PCDATA)>
7<!ATTLIST log
8 sev CDATA #REQUIRED
9 tstamp CDATA #REQUIRED
10 msg CDATA #REQUIRED
11>