PDF Object Types

Posted on April 2, 2013 by Mark Gavin in Learning PDF

A PDF file contains eight (8) types of objects called “CosObjects”. These are the core building blocks which make up the body of a PDF file. Objects can be either direct or indirect. Direct objects are just “inline values”. For example; /Filter /FlateDecode. Here the key is Filter with a direct name value of FlateDecode. Indirect [...]

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PDF Hello World

Posted on March 29, 2013 by Mark Gavin in Learning PDF

by Mark Gavin Below is a minimal PDF document which displays the text “Hello World”. This PDF document is formatted for readability. The header, xref and trailer have been omitted. Start at the bottom at Object 6, the “Catalog” dictionary, and work up through the object numbers. Object 6 contains a reference to the “Pages” dictionary [...]

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