[SyncEvolution] RRULE fieds : occurence vs untilDate

Hello, is there a way in RRULE property to mention the occurence value of an event cause always we get the End fields that indicate until date ? i take that exemple : Daily for 10 occurrences: D1 #10 Daily until 12/24/94: D1 19941224T000000Z by getting the RRULE fields for these two ewamples (Interval , Freq ,Fmask, Lmask , End ) we can't determine either an event is an event with until date or an event with occurence. THX.