It is superseded by later versions of the PNG format.
It is superseded by later versions of the PNG specification.
RFC 2083 specifies
version 1.0 of the PNG graphics file format.
It is not an official IETF standard,
but it is a World Wide Web Consortium recommendation
described [here].
It is superseded by later versions of the PNG specification.
External links:
[Full text of RFC 2083]PNG (Portable Network Graphics) Specification Version 1.0. [Thomas Boutell]?. March 1997. (Format: TXT=242528 bytes) (Status: INFORMATIONAL)