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More Complex Example -- PDF
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Much more than
text
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A
file format, a wrapper, a bundling format, all in one
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Complexity
of relationships
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1.3 (July 2000, 696 pages)
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1.4 (December 2001, 978 pages)
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1.5 (August 2003, 1172 pages)
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TIFF, JPEG,
JPEG2000, etc., etc., etc. (all at once)
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Tagged PDF (can
represent logical document structure)
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Accessible PDF
(tagged + further constraints)
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PDF/X
(ISO standard, for pre-press use, e.g., submission
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of graphics to
magazine publishers)
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PDF/A
(Under development as ISO standard, for
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archiving)
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