Dynamics 365 Application Object Tree

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A full definition of all the element types in the Application Object Tree (AOT) can be found in the development training material and developer Help files. Some of the root element types include: 

Application Explorer opens from Visual Studio


• Data Dictionary contains objects that define the basic data structure. 


• Tables contain a group of associated fields. For example, the CustTable contains fields relevant to customers. Fields on a table contain individual pieces of data. For example, AccountNum contains the customer's account number. Fields in a table inherit properties from extended data types. 


• Extended data types define a data type and extended properties. There are various basic data types, such as string, integer, date, time, and enum. For example, AccountNum is a string extended with properties including a length of 20 characters, being left justified, and is mandatory. 


• Base Enums are enumerated text data types. These are predefined text values that are referenced by an integer value in the database. These are presented to the user as a fixed list of options. For example, blocked is an enum that gives the user only two options (yes or no) as to whether a customer account is on hold. 


• Classes contain code that is used in the application. 


• Forms define the layout of all of the forms. Forms are used to view data in the Microsoft Dynamics 365 client. 


• Menus define forms and reports that appear in the menu in the Microsoft Dynamics 365 rich client.





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