period — A period of time
The period element defines a specific period in time by specifying the period's start time and end time.
If you want to specify an instant in time instead of a period, use date.
period may be contained in these elements: award, clearance, degree, job, membership
<period>
<from><date>
<dayOfMonth>10</dayOfMonth>
<month>February</month>
<year>1246</year>
</date></from>
<to><date>
<dayOfMonth>19</dayOfMonth>
<month>November</month>
<year>1351</year>
</date></to>
</period><period>
<from><date>
<month>May</month>
<year>1985</year>
</date></from>
<to>
<present/>
</to>
</period>