/usr/local/lib/swipl/library/ext/clib/socket.pl
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 socket_create(-SocketId, +Options) is det
Create a socket according to Options. Supported Options are:
domain(+Domain)
One of inet (default), inet6, unix or local (same as unix)
type(+Type)
One of stream (default) to create a TCP connection or dgram to create a UDP socket.

This predicate subsumes tcp_socket/1, udp_socket/1 and unix_domain_socket/1.