13.3.2 Modules and libraries

Every module is in a library; therefore,

• All the library's modules, including those imported by using other libraries, are visible to, and can be used by, the module.

• The library controls whether the module is exported, and therefore is visible, to other libraries.

• Modules in other libraries that are not exported, or ones that are exported but are not imported by the module's library, are not visible to the module.

Dylan implementations can associate a module with a library in different ways. The library-interchange definition (LID) format lists the interchange files that make up a library. The module definitions in those interchange files are thus in that library.