What is 'CDS metadata extension' in SAP BC-ABA - ABAP Runtime Environment?

CDS metadata extension - Overview

• Component: BC-ABA

• Component Name: ABAP Runtime Environment

• Description: A CDS object of the ABAP CDS defined in a piece of DDL source code using language elements in CDS DDL. In a CDS metadata extension MDE ,CDS annotations are specified for a CDS entity outside of the corresponding data definition. A CDS metadata extension is always assigned to a layer such as industry, partner or customer and can be joined using a CDS variant, in order to control its evaluation.

CDS metadata extension - Details

• 
  Key Concepts: 
  CDS metadata extension is a feature of the ABAP Runtime Environment (BC-ABA) in SAP. It allows developers to extend the metadata of CDS views with additional information, such as annotations, labels, and descriptions. This helps to improve the readability and maintainability of CDS views. 
  
  How to use it: 
  To use CDS metadata extension, developers must first create a CDS view in the ABAP Development Tools (ADT). Then, they can add the additional information to the view using annotations. Annotations are written in a specific syntax and can be used to add labels, descriptions, and other information to the view. 
  
  Tips & Tricks: 
  When using CDS metadata extension, it is important to ensure that all annotations are written correctly. Incorrect syntax can lead to errors when running the view. Additionally, it is important to keep the annotations up-to-date with any changes made to the view. 
  
  Related Information: 
  For more information on CDS metadata extension, please refer to SAP Help Portal: https://help.sap.com/viewer/product/ABAP_DEVELOPMENT_TOOLS/731/en-US