diff --git a/models/workflow/workflow_schedule.go b/models/workflow/workflow_schedule.go
index 0d12a26..3204c31 100644
--- a/models/workflow/workflow_schedule.go
+++ b/models/workflow/workflow_schedule.go
@@ -2,8 +2,17 @@ package oclib
 
 import "time"
 
+// WorkflowSchedule is a struct that contains the scheduling information of a workflow
+type ScheduleMode int
+
+const (
+	TASK ScheduleMode = iota
+	SERVICE
+)
+
 type WorkflowSchedule struct {
 	Id    string     `json:"id"`
+	Mode  int64      `json:"mode" bson:"mode" validate:"required"`
 	Name  string     `json:"name" bson:"name" validate:"required"`
 	Start *time.Time `json:"start" bson:"start" validate:"required,ltfield=End"`
 	End   *time.Time `json:"end,omitempty" bson:"end,omitempty"`