Viivi I/O-Targets

Viivi can use as I/O-targets, not only files which are specified in R5RS, but also network-ports and virtual-ports.
The difference in using them is only in their name-formats.
In the same way regardless of the types, the user is able

• to specify them as alternatives to the standard I/O-ports in the Viivi argument-commands.
• to open I/O-ports using the Scheme codes (with open or other procedures).
• to read or write from/to the opened I/O-ports using the Scheme codes (with read, write, or other procedures).

The types and the name-formats of the I/O-targets are as follows, respectively:

• Files			"FILENAME"

• Network-Ports		"HOSTNAME:PORTID"

• Virtual I/O-Ports	"[VIRTUALPORTNAME]"