I presented these same slides at the FHIR DevDays. The overall goal is 15 Minute presentations that build first explaining general Document Sharing (XDS, XCA, etc), then Mobile access to Health Documents (MHD), and finally the Mobile Cross-Enterprise Document Data Element Extraction (mXDE) which orchestrates Query Element Data for Mobile (QEDm).
The slide deck is also available to View and download.
View Document Sharing Slides
View MHD Slides
View mXDE Slides