Wix Provides and Requires example (non-working)

child.wxs

<?xml version="1.0" encoding="UTF-8"?>
<?define VERSION=!(bind.FileVersion.ChildConsole.exe)?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi"
     xmlns:Dep="http://schemas.microsoft.com/wix/DependencyExtension">
	<Product Id="*" Name="ChildInstaller" Language="1033" Version="$(var.VERSION)" Manufacturer="Child Entity" UpgradeCode="6607f3eb-256f-44d8-a7d5-efe6f21f07e4">
		<Package InstallerVersion="200" Compressed="yes" InstallScope="perMachine" />

    <MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." />
		<MediaTemplate />

		<Feature Id="ProductFeature" Title="ChildInstaller" Level="1">
			<ComponentGroupRef Id="ProductComponents" />
		</Feature>
	</Product>

	<Fragment>
		<Directory Id="TARGETDIR" Name="SourceDir">
			<Directory Id="ProgramFilesFolder">
				<Directory Id="INSTALLFOLDER" Name="ChildInstaller" />
			</Directory>
		</Directory>
	</Fragment>

	<Fragment>
		<ComponentGroup Id="ProductComponents" Directory="INSTALLFOLDER">
      <Component Id="ProductComponent" Guid="{CD433A90-955C-454A-A883-B12E72C74C11}">
        <Dep:Provides Id="tabbedOutProvider">
         <Dep:Requires ProviderKey="Provider-Zazzle"/>
        </Dep:Provides>
        <File Source="$(var.ChildConsole.TargetPath)" />
      </Component>
    </ComponentGroup>
	</Fragment>
</Wix>

parent.wxs

<?xml version="1.0" encoding="UTF-8"?>
<?define VERSION=1.0.0?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi"
     xmlns:Dep="http://schemas.microsoft.com/wix/DependencyExtension">
	<Product Id="*" Name="TabbedOut Provider" Language="1033" Version="$(var.VERSION)" Manufacturer="Parent Company" UpgradeCode="5119e76d-3fbc-44f9-af69-0935f3e1aa41">
		<Package InstallerVersion="200" Compressed="yes" InstallScope="perMachine" />

    <MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." />
		<MediaTemplate />

		<Feature Id="ProductFeature" Title="SetupProject1" Level="1">
			<ComponentGroupRef Id="ProductComponents" />
		</Feature>
	</Product>

	<Fragment>
		<Directory Id="TARGETDIR" Name="SourceDir">
			<Directory Id="ProgramFilesFolder">
				<Directory Id="INSTALLFOLDER" Name="SetupProject1" />
			</Directory>
		</Directory>
	</Fragment>

	<Fragment>
		<ComponentGroup Id="ProductComponents" Directory="INSTALLFOLDER">
			<Component Id="ProductComponent" Guid="{CD433A90-955C-454A-A883-B12E72C74C11}">
        <Dep:Provides Id="tabbedOutProvider" Key="Provider-Zazzle"/>
        <File Source="$(var.ParentConsole.TargetPath)" />
      </Component>
		</ComponentGroup>
	</Fragment>
</Wix>