Precedence Constraints

<Packages>
        <Package Name="Rebuild Warehouse Schema" ConstraintMode="Parallel">
            <!-- A series of ExecutePackage tasks that are constrained with precedence constraints 
                    specified in each task -->
            <Tasks>
                <ExecutePackage Name="Create Database">
                    <Package PackageName="Create Database" />
                </ExecutePackage>
                <ExecutePackage Name="Create Tables">
                    <PrecedenceConstraints>
                        <Inputs>
                            <Input OutputPathName="Create Database.Output" />
                        </Inputs>
                    </PrecedenceConstraints>
                    <Package PackageName="Create Tables" />
                </ExecutePackage>
                <ExecutePackage Name="Create Scalar-valued Functions">
                    <Package PackageName="Create Scalar-valued Functions" />
                    <PrecedenceConstraints>
                        <Inputs>
                            <Input OutputPathName="Create Tables.Output" />
                        </Inputs>
                    </PrecedenceConstraints>
                </ExecutePackage>
                <ExecutePackage Name="Create Database Triggers">
                    <Package PackageName="Create Database Triggers" />
                    <PrecedenceConstraints>
                        <Inputs>
                            <Input OutputPathName="Create Scalar-valued Functions.Output" />
                        </Inputs>
                    </PrecedenceConstraints>
                </ExecutePackage>
            </Tasks>
        </Package>
    </Packages>