Declaring one
The attribute takes no value. Give the element an id so an include can reference it.
<li id="menuItem" b-includable>
<span b-value="name"></span> <span b-value="price"></span>
</li>
Bindings inside an includable are resolved when it is included, against whatever context the including
element sits in. That is what makes one template usable for three different collections: the markup
describes the shape, the include site supplies the data.