information about binding context of compose is hard to find

I am not finding an description of what is the binding context of a view when composed using the "compose" element.

Seems like I've seen that somewhere, but I think it should be a lot easier to find.

I would suggested putting that information here: http://aurelia.io/hub.html#/doc/article/aurelia/templating/latest/templating-basics/3

Start with the Aurelia templating-basics article linked in the issue: http://aurelia.io/hub.html#/doc/article/aurelia/templating/latest/templating-basics/3. Read the surrounding guidance on the compose element and add an easy-to-find explanation of a composed view's binding context; done means the requested information is documented there.

Written by the indexing model from the issue text.