How to force child element to have a value in XSD?

user_3756056 0
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I have XML (as an example) with a segment called Type within the segment Order. The segment is a one to many, so we have something like :

<Order>
  <Type>1</Type>
  <Type>2</Type>
  <Type>3</Type>
</Order>

Now the validation should be, that there always should be segment Type with value 1 in the segment Order, if not, a validation error should occur. I tried some validations, but could not get the correct result. Has someone thought on how to implement this and if this is even possible?

xsd-validation xml-validation xml xsd
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