Add general text format to the next version of the spec #360
Description
As discussed in https://docs.google.com/document/d/1Gr9QD6kt3_DcxRJSFpuoqWWMAJMRqCGd1kPcroNUyh8/edit?pli=1#heading=h.q99n7jrc8dcc, we want to add general text protocols to the spec.