PlainText

a fuzzy name for non-binary data

sometimes implies there are no tags in the format

You might assume this means ASCII, but it could be some other Character Set, which you'll eventually wish was UniCode/UTF-8.

see related SmartAscii

Michael Schechter: http://bettermess.com/a-plain-text-primer/

Popular MacOs X NoteBook app: Notational Velocity