->WILD as a Component Value (ANSI and GNU Common Lisp Document)

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#### 19.2.2.8 :WILD as a Component Value

If `:wild` is the value of a pathname component, that component is considered to be a wildcard, which matches anything.

A conforming program must be prepared to encounter a value of `:wild` as the value of any pathname component, or as an element of a list that is the value of the directory component.

When constructing a pathname, a conforming program may use `:wild` as the value of any or all of the directory, name, type, or version component, but must not use `:wild` as the value of the host, or device component.

If `:wild` is used as the value of the directory component in the construction of a pathname, the effect is equivalent to specifying the list `(:absolute :wild-inferiors)`, or the same as `(:absolute :wild)` in a file system that does not support `:wild-inferiors`.