What is the definition of a mashup in the context of integration?

In the context of integration, a mashup is defined as a combination of data from external systems at the user interface level. This means that a mashup aggregates information and services from multiple sources, allowing users to interact with different systems as a single cohesive application. By pulling in data from various external sources, a mashup enhances the user experience by providing comprehensive information and functionality without requiring separate logins or interfaces for each system.

The focus on the user interface level is key; it allows for innovative and seamless experiences where data can be presented in a unified way while still originating from disparate sources. This approach is commonly seen in web applications where information from different APIs or web services is displayed together, enabling users to leverage multiple functionalities concurrently.

Understanding this definition helps to recognize that mashups are more about presenting and integrating data than about direct database management, encryption, or specific API operations. Each of those other choices serves different purposes in integration contexts, but they do not encapsulate the interactive, user-centered nature of a mashup as clearly as the correct choice does.