Binding value to component

[Babalas]

I've got a setting in my main qml file that I want to pass to a custom settings component to modify. So in main I have this:
@Atmosphere { hr: 8 ... }@

And at the moment my setting is:
@Setting {
minimumValue: 1.0
maximumValue: 12.0
text: "Hr"
setting: atmosphere.hr
onSettingChanged: atmosphere.hr = setting
}@

Where "setting" is a property variant in my Setting component that ultimately gets connected to the value of a slider. Within a component I can use alias. Is there something equivalent externally to a component? I.e. can I pass atmosphere.hr to Setting as a reference value that Setting can update directly rather than going through the onSettingChanged signal?

Thanks