Q1:
Vue.extend create a component construct of Vue, override it by pass data or $el to params
Vue.Component register a component
But
How to do component inherit other?is it necessary？
For Example:
TableGrid, TreeGrid inherit Grid

Q2:
a component from vue.extend. register it by Vue.Component('my-component', Vue.extend({}))
how to use this in Father Compoent?

var Father  = new Vue({
//...
    components: {
          //how put it here？
     }
//...

})