present — Indicates the current time
The present element denotes the current time, as opposed to a fixed time in the past or future. It is most commonly used in date ranges, to express things like “From May 1995 to present”.
present is a null element, that is, it has no content or attributes. It is always written as <present/>.
<period> <from><date> <month>May</month> <year>1995</year> </from> <to> <present/> </to> </period>