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Microsoft Dynamics AX 2009 Programming: Getting Started by Erlend Dalen

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Architecture

Now that you have seen some of the development tools in AX, let's have a look at how AX is built from a technical perspective.

We will look at the following concepts:

  • Application object layers
  • Network tiers

Application object layers

Dynamics AX 2009 consists of sixteen application object layers that contain all the elements you see in the AOT.

These layers can be looked at as an onion with multiple layers. In the middle is the core application in the SYS layer and the outermost layer is the user layer USR.

Therefore, when any application element is being executed the system will look at the outermost code layer first to see if there is any code for that element; if not, it peels a layer off the onion, and tries the next layer. When it ...

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