In WIX I'd like a feature to be installed and uninstalled normally but not to be touched during repair. 

I was not able to find a condition which would allow me to do this.
My attempts has failed: the feature is reinstalled on repair (what I do not need) or is not uninstalled.

This is a sample that I tried last:

```
<Feature Id="aFeature" Title="A Features" Level="1">
  <ComponentRef Id="aComponent" />
  <Condition Level="0">
    <![CDATA[WixUI_InstallMode="Repair"]]>
  </Condition>
</Feature>

```

What is the right condition to uninstall but not re-install during repair?
Or what did I do wrong?