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For every Transaction object, you have to define the attributes or fields that describe that object of reality.

Suppose you were asked to record, for each customer, his/her name, last name, address, phone, and email. Therefore, the data that must be recorded for each customer matches the attributes that have to be created for the Customer Transaction.

After creating the Customer Transaction, its Structure is shown with the first line created to enter the first attribute:


If you press the “dot” key on the keyboard, GeneXus automatically shows the Transaction name as a prefix in the attribute name:


You only have to type "Id" after the "Customer" prefix to complete the first attribute name. Next, you press the Tab key and choose the data type that will be stored for this attribute:


The data type combo box displays the data types available in GeneXus. For this attribute you can leave the default data type, that is to say: Numeric of 4 digits (with no decimals).

Pressing Enter opens a new line for you to start creating the second attribute.

It is strongly recommended to press the “dot” key on the keyboard when creating a new attribute to obtain automatically the Transaction name as a prefix in the attribute name. This helps to avoid typing errors and to name attributes correctly.

Note that an icon key is associated with the first line. The reason is that in every Transaction, an attribute – or set of attributes – must be set with an identifier or key role.

After creating the Customer Transaction object, you have two alternatives to define its attributes:

  1. Through the Source editor
  2. Through the Structure editor

The attribute definitions you make through one editor or the other will be reflected in both. You can choose to use the Source editor or the Structure editor depending on which editor you like to work with.

Below you can see the brand new Customer Transaction (recently created), ready for you to define its attributes. By default, the Source editor is open. You can select the Structure editor (by clicking on the Structure selector). You can also use both editors alternating between them.


Continuing with the example that for each customer it is necessary to register his/her name, last name, address, phone, and email, below is the Customer Transaction Structure (the definition was made through this editor):


The Source editor was automatically completed with the same definitions:



  • When using the Source editor, not only can you type the data type, but you can also use the Properties Editor.
  • Note the icons/symbols in both editors. Their interpretation is usually intuitive. Some particular symbols in the Source editor are:

See also

Insert Attribute/Variable Dialog


Start Video First Transaction design

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