The unified access layer is responsible for providing access to both the serving analytical data storage layer and third-party APIs exposed by the data intelligence layer. The unified access layer should provide universal, scalable, and secure access to any downstream applications and systems that require it, and typically involves the architecting and engineering of APIs and/or implementations of data federation and virtualization patterns. Examples of open source technologies used to implement the unified access layer include the following:
- Spring framework
- Apache Drill
