[for (
  d : Class |
  r.ownedElement
  ->filter(Class)
  ->select(not getAppliedStereotype('SysML::Requirements::Requirement').oclIsUndefined())
  ->sortedBy(
      c1 : Class |
      c1.getValue(
          getAppliedStereotype('SysML::Requirements::Requirement'),
          'id'
      ).toString()
  )
)]

Derived:
[if (d.getValue(getAppliedStereotype('SysML::Requirements::Requirement'),'derived')->flatten()->notEmpty())]<drop/>
[for (
  derived : Class |
  d.getValue(
      getAppliedStereotype('SysML::Requirements::Requirement'),
      'derived'
  )->flatten()
)]<drop/>
[derived.getValue(getAppliedStereotype('SysML::Requirements::Requirement'),'id')/]
[/for]<drop/>
[else]<drop/>
There isn't derived requirements.
[/if]<drop/>

[/for]