Apps
in SharePoint 2013:
An app for SharePoint is a web application that is registered with SharePoint using an app manifest and An app manifest is an XML file that
declares the basic properties of the app along with where the app will run and
what to do when the app is started.
App Model: The new app model will give us the
opportunity to extend our SharePoint system with custom coding. Earlier models
support Sandbox solutions and in 2013 we have both Sandbox and App
models.
