Difference between Refresh AOD, Refresh Data, Refresh dictionary on enterprise portal - Dynamics AX 2012

While development of Enterprise portal you might need to use following options:

Refresh AOD: This refreshes all the AOT elements except  elements in Data Dictionary node for example classes, data sets web menu items etc.

Refresh Data: Refreshes any static data that is used on enterprise portal sessions.

Refresh Dictionary: Refreshes the elements contained in Data Dictionary node of AOT for example tables, EDT, enums, views etc.