A subject area is a collection of business subjects that are closely correlated with each other. A subject area is used to divide a data mart from various analysis perspectives. You can classify business subjects into different subject areas based on your business requirements. For example, you can create a transaction subject area, a member subject area, and a commodity subject area for e-commerce data.
Prerequisites
A data mart is created to determine the subject of the business category to which the subject area is applied. For more information about data marts, see Data mart.
Create a subject area
Go to the Data Layer page.
Log on to the DataWorks console. In the top navigation bar, select the desired region. In the left-side navigation pane, choose . On the page that appears, select the desired workspace from the drop-down list and click Go to Data Modeling.
In the top navigation bar of the Data Modeling page, click Data Warehouse Planning. The Data Layer page appears.
In the left-side navigation pane of the Data Warehouse Planning tab, choose to go to the Subject Area page.
Create a subject area.
On the Subject Area page, move the pointer over the
icon and click Create First-level Subject Area. In the Create First-level Subject Domain dialog box, configure the parameters.
Parameter
Description
Abbreviation
The abbreviation for the name of the subject area.
The abbreviation can be a maximum of 128 characters in length. It can contain only lowercase letters, digits, and underscores (_) and must start with a lowercase letter.
Subject Area Name
The name of the subject area.
The name can be a maximum of 2,048 characters in length. It can contain letters, digits, underscores (_), ampersands (&), and parentheses () and must start with a letter or a digit.
Owner
The owner of the subject area. The default value of this parameter is the Alibaba Cloud account that is used to log on to the DataWorks console.
Data Mart
The data mart to which the subject area belongs. For more information about data marts, see Data mart.
Description
The description of the subject area.
The description of the data layer can be a maximum of 2,048 characters in length.
Click OK. The subject area is created.
If you want to modify or delete a subject area, you can find the name of the subject area in the Subject Area pane, right-click the name, and then select Edit or Delete.
Create a child subject area
You can create child subject areas for each subject area. The method used to create a child subject area is the same as the method used to create a subject area.