Control Flow Precedence Constraints

This snippet shows some example uses of Precedence Constraints in SSIS control flow.

<Biml xmlns="http://schemas.varigence.com/biml.xsd">
  <Packages>
    <Package Name="Control Flow Sample 1" AutoCreateConfigurationsType="None" ConstraintMode="Linear">
      <Tasks>
        <Dataflow Name="Task 1"/>
        <Dataflow Name="Task 2"/>
        <Dataflow Name="Task 3"/>
      </Tasks>
    </Package>
    <Package Name="Control Flow Sample 2" AutoCreateConfigurationsType="None" ConstraintMode="Parallel">
      <Tasks>
        <Dataflow Name="Me First"/>
        <Dataflow Name="Me Next (Success)">
          <PrecedenceConstraints>
            <Inputs>
              <Input OutputPathName="Me First.Output"/>
            </Inputs>
          </PrecedenceConstraints>
        </Dataflow>
        <Dataflow Name="I'm Last (Always)">
          <PrecedenceConstraints LogicalType="Or">
            <Inputs>
              <Input OutputPathName="Me First.Output" EvaluationValue="Failure"/>
              <Input OutputPathName="Me Next (Success).Output" EvaluationValue="Completion"/>
            </Inputs>
          </PrecedenceConstraints>
        </Dataflow>
      </Tasks>
    </Package>
    <Package Name="Control Flow Sample 3" AutoCreateConfigurationsType="None" ConstraintMode="Parallel">
      <Variables>
        <Variable Name="Continue" DataType="Int32">0</Variable>
      </Variables>
      <Tasks>
        <Dataflow Name="Task 1"/>
        <Dataflow Name="Task 2">
          <PrecedenceConstraints>
            <Inputs>
              <Input OutputPathName="Task 1.Output" EvaluationOperation="Expression" Expression="@Continue==1"/>
            </Inputs>
          </PrecedenceConstraints>
        </Dataflow>
      </Tasks>
    </Package>
  </Packages>
</Biml>