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It is superseded by later versions of the PNG specification.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)
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