Where I can find api documents of qml?

[qasdfgtyuiop]

I want to insert some icon in my qml widget, and using javascript to
access calendar.  But I can not find the document related to this.
Where can I find a document of plasma qml?

I have seen these pages but find nothing helpful, these pages don't
contain enough information:
http://techbase.kde.org/Development/Tut ... ingStarted
http://techbase.kde.org/Development/Tut ... ma/QML/API
http://api.kde.org/4.x-api/plasma-qml-apidocs/

But I can't find the api of org.kde.plasma.core and org.kde.akonadi
Thanks