Course
Pluralsight
Self-paced
Video
Pluralsight: SharePoint 2013 Developer Ramp-Up - Part 6: Automating Business Process, Enterprise Data and Search
In this course students will learn how to consume and interact with external data sources as well as how to create a custom .NET Assembly Connector.
Open on Pluralsight
The course lives on Pluralsight — this page is a pointer with the details.