This document discusses analyzing learning flows in digital learning ecosystems. It describes digital learning ecosystems as socio-technical systems consisting of digital tools, services, content, and user communities. It proposes combining the Experience API (xAPI) specification with the Uptake Framework to record and analyze learning interactions in digital ecosystems at scale. By annotating events with pedagogical verbs and domain concepts, this approach could provide feedback to learners and teachers through uptake diagrams and contingency maps of interaction patterns. The approach is demonstrated through a concept mapping scenario and holds potential for advancing analytics of distributed and user-defined learning interactions.