Conditional on value in xsd

Hi, is there any way to add conditions on a tag value?

For example, my xml looks like this:

<Root>
 <Scheduler>
  <DateTimeType>DAY</DateTimeType>
  <DayOfWeek>Sunday</DayOfWeek> --> TAG IS ALLOWED
 </Scheduler>

 <Scheduler>
  <DateTimeType>MONTH</DateTimeType>
  <DayOfWeek>Sunday</DayOfWeek> --> TAG IS NOT ALLOWED
  <DayOfMonth>28</DayOfMonth> --> TAG IS ALLOWED
 </Scheduler>

 <Scheduler>
  <DateTimeType>WEEKDAY</DateTimeType>
  <DayOfWeek>Sunday</DayOfWeek> --> TAG IS ALLOWED
  <TimeOfDay>15:26</TimeOfDay> --> TAG IS ALLOWED
  <DayOfMonth>28</DayOfMonth> --> TAG IS NOT ALLOWED
 </Scheduler>

 <Scheduler>
  <DateTimeType>TIME</DateTimeType>
  <DayOfWeek>Sunday</DayOfWeek> --> TAG IS NOT ALLOWED
  <DayOfMonth>28</DayOfMonth> --> TAG IS NOT ALLOWED
  <TimeOfDay>15:26</TimeOfDay> --> TAG IS ALLOWED
 </Scheduler>
</Root>

I need a XSD Schem that allow/not allows these conditions in my xml

Thanks