7.3 Packages

7.3.1 Built-in packages

The use list of a package is a list of the packages that are used by that package; the used-by list is a list of the packages that use that package. By default, the use list in Liquid Common Lisp contains thelisp package and theliquid-common-lisp package. The following packages are defined:

Thelisp package contains the basis of the Common Lisp system. An accepted standard definition for Common Lisp consists of the 775 symbols documented in CLtL2. All of these Common Lisp functions, macros, constants, variables, and special forms are external symbols in thelisp package. As a result, virtually all other packages use this package. Application programs should not make entries into this package.
The liquid-common-lisp package contains Liquid Common Lisp extensions to Common Lisp; its nickname islcl. All of the symbols in this package are documented symbols of Liquid Common Lisp. This package uses no other package, but it is used by most of the other packages. Application programs should not make entries into this package.
The user package is the package that normally becomes current when Common Lisp is started. Theuser package uses thelisp package and theliquid-common-lisp package.
The system package is an implementation-dependent package reserved for internal system functions; its nickname is sys. Thesystem package uses thelisp package and theliquid-common-lisp package, and it is used by such packages asliquid andwindows.
The keyword package consists of all the keyword symbols. Symbols in the keyword package are always external, and all are constants that evaluate to themselves. Thus, you do not need to quote keywords in function calls. Note that Lisp reads :direction askeyword:direction. Keywords should never be imported into other packages. Other packages cannot use the keyword package.
The liquid-runtime-support package contains Compiler-generated, internal symbols; its nickname is lrs. This package uses no other package and should not be used by another package. Application programs should not make entries into this package. You should not rely on any particular properties of this package.
The liquid package is the basic development package of Liquid Common Lisp. You should not rely on any particular properties of this package.
The loop package is an internal artifact of this implementation of the Common Lisploop macro, which is documented in the guide The Loop Facility.
The following packages contain extensions that are specific to a particular system facility but that are not generally available:
- windows
- clos,clos-internals

In accordance with the ANSI Common Lisp standard, the packagescommon-lisp (nicknamecl) andcommon-lisp-user (nicknamecl-user) are available as a loadable module,ansi-packages.xbin (see Section 2.1.4 of The User's Guide for the binary file extension for your platform). When the module is loaded, the package structure is as described in Chapter 11 of CLtL2.

The Common Lisp functionsdo-all-symbols,find-all-symbols, andapropos exclude any package that is on the list that is bound to the global variable*all-symbols-exclusions*; initially, theliquid package is on this list.

The Advanced User's Guide - 9 SEP 1996

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