All,
Is it possible to normalize pre-Christian era dates using ISO
8601? I've got a series consisting of artifacts ca. 6th century-1st
century B.C. The standard
(http://xml.coverpages.org/ISO-FDIS-8601.pdf) is designed
for use with the Gregorian calendar, and cautions about its use for dates
preceding 1582.

Any advice on encoding my <unitdate> would be appreciated!

Mary Lacy
Manuscript Division, Library of Congress
(202)707-8799 fax (202)707-6336
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**usual disclaimers apply**