ANSI Common Lisp 11 Packages 11.1 Package Concepts
11.1.1 Introduction to Packages
A package establishes a mapping from names to symbols.
At any given time, one package is current.
The current package is the one that is the value of *package*.
When using the Lisp reader,
it is possible to refer to symbols in packages
other than the current one through the use of package prefixes in the
printed representation of the symbol.
The next figure lists some defined names that are applicable
Where an operator
takes an argument that is either a symbol or a list
an argument of nil is treated as an empty list of symbols.
Any package argument may be either a string, a symbol, or
a package. If a symbol is supplied, its name will be used
as the package name.
Some Defined Names related to Packages
220.127.116.11 Package Names and Nicknames
18.104.22.168 Symbols in a Package