For starters in dynamics AX it’s really important to know where
the main development structure lies i.e. AOS. In Microsoft Dynamics AX,
there is a 3-tier infrastructure with a database server, an application object
server (AOS), and a client. The database server contains the table data. The
AOS is used to execute application objects, such as queries and classes. Application
objects in the user interface, such as forms and reports, run on the client
computer.
Now let’s look into how we can open and use AOS. On Microsoft
Dynamics AX press [Ctrl] + D to open AOS. When AOS open a window
is displayed showing Application Object Tree (AOT). This is basically the
core unit from where you can go through your table or existing table, change
schema, change classes, create or change forms and lots of more.
Fig 1:
Fig 1 shows a top level view
of the AOT, here you can view all the components. For example Data Dictionary
contains all the table, data types, views, enums etc. Parts contain all the info parts and
form parts.

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