Sap hana studio repository2/13/2023 ![]() ![]() Core Data Services focus on providing functional services independent of any programming language and language paradigms. The Expression Language (EL) for specifying calculated fields, default values, constraints, etc.within queries as well as for elements in data models Besides these DSLs, Core Data Services also comprise advanced means for writing data, handling transactions, access control – yet these services are not yet specified in details as of now. The Query Language (QL) for conveniently and efficiently reading data based on data modelsas well as for defining views within data models. The Core Data Services comprise a family of domain-specific languages (highlighted in the illustration above) which serve as a common core model for all stacks on top:The Data Definition Language (DDL) for defining semantically rich domain data models which can be further enriched through Annotations.
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