parse a period value of the form < start > / < end > . this does not yet recognize the < start > / < duration > form . concode_field_sep Pattern IGNORABLE_ICAL_WHITESPACE concode_elem_sep Pattern DATE_VALUE concode_field_sep DateValue parseDateValue concode_elem_sep DateValue parseDateValue concode_elem_sep String unfoldIcal
PeriodValue function ( String arg0 ) { return parsePeriodValue ( arg0 , null ) ; }