C.3. RFC Format
To correspond with the model of RFCs as books, RFCs are mostly paginated documents. For historical reasons, they are usually in ASCII and appear in a fixed-width font. Pages have a line of header and a line of footer. A form feed (x0C) character separates pages, and figures are drawn by “ASCII art.” RFCs can also be in Postscript (.ps) or PDF (.pdf); for standards-track RFCs, an authoritative ASCII (.txt) version must exist.
 | This ASCII format is fairly archaic but it has stood the test of time in being readable, authorable, and searchable on almost any platform for several decades and appears likely to continue to work as well for ... |
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