The syntax of a logical pathname namestring is as follows. (Note that unlike many notational descriptions in this document, this is a syntactic description of character sequences, not a structural description of objects.)
logical-pathname ::=[!host host-marker] [!relative-directory-marker] {!directory directory-marker}{* } [!name] [type-marker !type [version-marker !version]]
host ::=!word
directory ::=!word | !wildcard-word | !wild-inferiors-word
name ::=!word | !wildcard-word
type ::=!word | !wildcard-word
version ::=!pos-int | newest-word | wildcard-version
host-marker---a colon.
relative-directory-marker---a semicolon.
directory-marker---a semicolon.
type-marker---a dot.
version-marker---a dot.
wild-inferiors-word---The two character sequence "**" (two asterisks).
newest-word---The six character sequence "newest" or the six character sequence "NEWEST".
wildcard-version---an asterisk.
wildcard-word---one or more asterisks, uppercase letters, digits, and hyphens, including at least one asterisk, with no two asterisks adjacent.
word---one or more uppercase letters, digits, and hyphens.
pos-int---a positive integer.
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