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ABAP CDS in ABAP Dictionary
The ABAP Core Data Services (ABAP CDS) are the platform-independent implementation of the general CDS concept for AS ABAP. The ABAP CDS make it possible to define semantic data models on the standard AS ABAP database. Unlike the SAP HANA-specific variant HANA CDS, the ABAP CDS are independent of the database system. The entities of the models defined in ABAP CDS provide enhanced access functions compared with existing database tables and views defined in ABAP Dictionary, making it possible to optimize Open SQL-based applications. This is particularly clear when an AS ABAP uses a SAP HANA database, since its in-memory characteristics can be implemented in an optimum manner.
The data models are defined in the form of CDS objects using the CDS DDL and CDS DCL provided by ABAP CDS in the syntax of ABAP CDS in CDS source code. The CDS objects defined with these languages are integrated into ABAP Dictionary and managed here. CDS annotations can be used to define metadata for CDS objects.