Documentation conventions
RFC 10, “Documentation conventions”, is an Unknown document published in July 1969 by S.D. Crocker. It obsoletes RFC 3. It has since been updated by RFC 24, RFC 27, RFC 30. It has been obsoleted by RFC 16 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
What “Unknown” means
The standards-track status of this early RFC was never formally classified.
The canonical text of RFC 10 is hosted at rfc-editor.org. Available in TXT,HTML.