A model is a set of elements in a given layer. Each layer consists of one or more models. Each layer contains one system-generated model that is specific to that layer. Every element in a layer belongs to only one model. In other words, no element can belong to two models in the same layer, and every element must belong to a model.
A default model owned by Microsoft exists in each layer. Default models cannot be modified.
A model is permanently associated with the layer that the model was created in. If you need to move one of your models from one layer to another, you must create a project from the model in the Application Object Tree (AOT), export the project as an xpo file, create a target model in the desired layer, delete the original model to avoid having to resolve layer conflicts, and import the xpo file to the target model. If you are moving elements between models in the same layer, you can use the Move to modelcommand in the AOT.
Models are stored in the model store. The model store is a database in which all application elements for Microsoft Dynamics AX are stored. Customizations are also stored in the model store. The model store replaces the Application Object Data (AOD) files that were used in earlier versions of Microsoft Dynamics AX. Models that have been installed in the model store are used at run time.
Models can be exported to files that have the .axmodel extension. These files are called model files. Model files are deployment artifacts. Model files can be signed with strong name signing and Microsoft Authenticode signing.
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