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Allegro CL |
19 Filenames  19.2 Pathnames 19.2.2 Interpreting Pathname Component Values 19.2.2.2 Special Pathname Component Values
19.2.2.2.1 NIL as a Component ValueAs a pathname component value, nil represents that the component is "unfilled"; see Section 19.2.3 Merging Pathnames.The value of any pathname component can be nil. When constructing a pathname, nil in the host component might mean a default host rather than an actual nil in some implementations.
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