A broadcast is a special Office Online scenario where navigation through a document is driven by one or more presenters. A set of attendees can follow along with the presenter remotely.

See also

present, attend

Host Page
Host Frame
Outer Frame

The host page (also called the ‘host frame’ or ‘outer frame’) is the HTML page which will host an iframe that points to an Office Online application.

Session Context
The Session Context is an optional parameter that a host can include on a WOPI request. It is a string, and is passed to Office Online in the sc query string parameter. If included on a WOPI request, Office Online will return the value of sc as the value of the X-WOPI-SessionContext HTTP header when making the CheckFileInfo and CheckFolderInfo WOPI requests.