Beginning markup for a subject group in the main index. Ending markup for a subject group in the main index. Filename of first thread index page. Label string for the thread index. Ending markup for the thread index pages.
Filename prefix for thread index pages beyond the first page.
Hour offsets for timezones. Title for main index. Maximum number of levels to indent in thread index. Ending markup for a thread index message listing. Ending markup for a missing message in thread index.