Format 1 - Identifier 1data-name-1 2+ 2.0? 2.0.0 IN 2.0.0 OF 2.0.1data-name-2 3? 3.0 IN 3.0 OF 3.1file-name-1 4? ( 4.1+ 4.1 subscript 4.2 ) 5? ( leftmost-character-position: 5.1? length 5.2 )
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