This is a repository of published subject indicators for dates (using ISO 8601 notation).
The following formats are supported:
| Format | Example |
|---|---|
| YYYY | http://psi.semagia.com/iso8601/2010 for the year 2010 |
| YYYY-MM | http://psi.semagia.com/iso8601/2010-07 for July 2010 |
| YYYY-MM-DD | http://psi.semagia.com/iso8601/2010-07-31 for the 31st July 2010 |
| Dates before the year 0 (1 BC): | |
| -YYYY | http://psi.semagia.com/iso8601/-0010 for the year -10 (11 BC) |
| -YYYY-MM | http://psi.semagia.com/iso8601/-0010-04 for April -10 (11 BC) |
| -YYYY-MM-DD | http://psi.semagia.com/iso8601/-0010-04-01 for the 1st April -10 (11 BC) |
If a valid date in one of the above mentioned formats does not resolve against a PSI, please send an e-mail: <mail@semagia.com>