3 <!-- valid durations -->
4 <date duration="PT10M"/>
5 <date duration="-P10D"/>
6 <date duration="PT10H"/>
7 <date duration="PT10H10M10.5S"/>
8 <date duration="PT0.00001S"/>
9 <date duration="PT49.00001S"/>
10 <date duration="P0Y0M31DT10H10M10.09S"/>
11 <date duration="-P0Y0M31DT10H10M10.09S"/>
12 <date duration="PT100H100M100.001S"/>
14 <date duration="2001"/>
15 <date duration="2001-10-29T10:31:07"/>
16 <date duration="1970-01-01T00:00:00"/>
17 <date duration="1970-01-01T00:00:01"/>
18 <date duration="1969-12-31T23:59:59"/>
19 <date duration="1969-01-01T00:00:00"/>
20 <date duration="1971-01-01T00:00:00"/>
21 <date duration="0001-01-01T00:00:00"/>
22 <date duration="-0001-01-01T00:00:00"/>
24 <date duration="1970-01-01" />
25 <date duration="1970-01-01Z" />
26 <date duration="1970-01-01-11:00" />
27 <date duration="1970-01-01+11:00" />
28 <date duration="1970-01-01-12:00" />
29 <date duration="1970-01-01+12:00" />
30 <date duration="1970-01-01-13:00" />
31 <date duration="1970-01-01+13:00" />