Definition from from https://www.odata.org/ 

OData (Open Data Protocol) is an ISO/IEC approved, OASIS standard that defines a set of best practices for building and consuming RESTful APIs. OData helps you focus on your business logic while building RESTful APIs without having to worry about the various approaches to define request and response headers, status codes, HTTP methods, URL conventions, media types, payload formats, query options, etc. OData also provides guidance for tracking changes, defining functions/actions for reusable procedures, and sending asynchronous/batch requests.

OData RESTful APIs are easy to consume. The OData metadata, a machine-readable description of the data model of the APIs, enables the creation of powerful generic client proxies and tools.

OData in Nimbus

The full history of completed Nimbus sessions (according to retention policy) and their attributes, is exposed through an OData interface. This means that in order to extract the historical data available for your tenant, it is necessary to connect with a connector that supports OData, and query such data using OData syntax. There are various tools that can be used to achieve this. One example is given in the Use Case - Connecting to OData via Postman.

💡An OData connector is also used for pulling data into Power BI. 

Nimbus OData Connector URLs

Using the Nimbus Power BI Template – in conjunction with user credentials in one of the Nimbus Reporting Roles – you can get access to the Nimbus Odata feed. The OData connection is already pre-programmed for you in the Nimbus Power BI Template, so all you have to do, is add the URL relevant to your tenant, from the ones listed below.

Once connected via the provided OData URI serviceUri, the user is presented with the set of entities available from the Nimbus Reporting Model .

Odata Tables

Below is a list of OData tables available by connection string.