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OData ​

Overview ​

The OData Artefact (*.odata) is a configuration file used to define OData (Open Data Protocol) entities and their properties within a specific namespace. It contains metadata about entities, their properties, annotations, and associations, following the OData standards.

TIP

File extension: *.odata

Purpose ​

The OData Artefact serves as a blueprint for defining OData entities and their characteristics, such as properties, keys, and annotations. It enables developers to expose data models as OData services, allowing clients to interact with the data through standardized RESTful APIs.

Example ​

Here's an example of an OData Artefact configuration:

json
{
    "namespace": "org.apache.olingo.odata2.ODataCustomer",
    "entities": [
        {
            "name": "Customer",
            "alias": "Customer",
            "table": "CUSTOMER",
            "properties": [
                {
                    "name": "ID",
                    "column": "ID",
                    "nullable": false,
                    "type": "Edm.Int32",
                    "annotationsProperty": {}
                },
                {
                    "name": "NUMBER",
                    "column": "NUMBER",
                    "nullable": true,
                    "type": "Edm.Int32",
                    "annotationsProperty": {}
                },
                {
                    "name": "PAYMENT",
                    "column": "PAYMENT",
                    "nullable": true,
                    "type": "Edm.Int32",
                    "annotationsProperty": {}
                }
            ],
            "navigations": [],
            "handlers": [],
            "keys": [],
            "annotationsEntitySet": {},
            "annotationsEntityType": {
                "sap:semantics": "aggregate"
            },
            "aggregationsTypeAndColumn": {
                "NUMBER": "SUM",
                "PAYMENT": "AVERAGE"
            }
        }
    ],
    "associations": []
}

In this example, the OData Artefact defines an OData entity named "Customer" with properties such as "ID", "NUMBER", and "PAYMENT". It also includes annotations and aggregations for the entity.

Usage ​

  • OData Service Configuration: Developers use the OData Artefact to configure OData services by defining entities, properties, and annotations according to the OData specifications.

  • Data Modeling: The OData Artefact facilitates data modeling by providing a structured format for defining entities and their characteristics, allowing developers to represent complex data models as OData resources.

  • Service Consumption: OData services generated from the OData Artefact can be consumed by various client applications, enabling seamless data integration and interoperability across different systems and platforms.

Conclusion ​

The OData Artefact (*.odata) is a configuration file used to define OData entities and their properties within a specific namespace. It plays a crucial role in configuring OData services and facilitating data modeling for standardized RESTful APIs.

For detailed usage instructions and best practices, refer to the documentation of your OData service provider or consult with your project's architecture experts.