Variant objects in the context of HTTP are objects served by an Origin Content Server in a type of transmitted data variation (i.e. uncompressed, compressed, different languages, etc.).
HTTP/1.1 (1997–1999)[1][2] introduces Content/Accept headers. These are used in HTTP requests and responses to state which variant the data is presented in.[citation needed]
Client:
GET /encoded_data.html HTTP/1.1
Host: www.example.com
Accept-Encoding: gzip
Server:
HTTP/1.1 200 OK
Server: http-example-server
Content-Length: 23
Content-Encoding: gzip
<23 bytes of gzip compressed data>
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