Internet Direct (Indy) Version 9.0.2 Beta
TIdHTTPResponse.ResponseVersion
HHTP version used and supported in the HTTP response.

property ResponseVersion: TIdHTTPProtocolVersion;
Description
ResponseVersion is a TIdHTTPProtocolVersion property that represents the HTTP protocol version supported in a response received from an HTTP server. ResponseVersion is used to help determine the value used in the KeepAlive property.