19.2. :UNSPECIFIC as a Component Value
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## 19.2. :UNSPECIFIC as a Component Value [sec_19-2-2-2-3]

The symbol `:UNSPECIFIC` is not permitted as a pathname component for any slot of any pathname. It is also illegal to pass it as an argument to `MAKE-PATHNAME`, although it is a legal argument (treated as `NIL`) to `USER-HOMEDIR-PATHNAME`.

The only use for `:UNSPECIFIC` is that it is returned by `PATHNAME-DEVICE` for `LOGICAL-PATHNAME`s, as required by [sec_19-3-2-1].

| These notes document CLISP version 2.45 | Last modified: 2008-05-14

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