I can't get my app to work when I include a force:outputField component in it. For example, if I have the following then it's OK and I get the correct value rendered in my app:

<ui:outputText aura:id="pcode" value="{!v.product.productCode}"/>

...but if I change it to use force:outputField like so:

<force:outputField aura:id="pcode" value="{!v.product.productCode}"/>

...then I get the following failure when the app tries to render the component where I have the outputField:

"Assertion Failed!: Abstract component without provider def cannot be instantiated : markup://force:outputField : undefined. Please try again."

Is there something I am missing? This outputField component does exist in the developer reference (https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning/aura_compref_force_outputField.htm).