Adobe brackets portable9/14/2023 White-space characters: Null, Horizontal tab, Line feed, Form feed, Carriage return and Space. There are 3 types of characters - white-space, delimiter and regular characters. Before we look at them we will briefly look at the character set of PDFs. There are eight types of objects that are used in PDF files. The basic building blocks of a PDF files are objects. PDF also includes objects, such as annotations and hypertext links, that are not part of the page content itself but are useful for interactive viewing and document interchange." (Quoted from Page vii of PDF32000_2008.pdf). Unlike Postscript, which is a programming language, PDF is based on a structured binary file format that is optimized for high performance in interactive viewing. To improve performance for interactive viewing, PDF defines a more structured format than that used by most PostScript language programs. This PDF Imaging Model enables the description of text and graphics in a device-independent and resolution-independent manner. " At the core of PDF is an advanced imaging model derived from the PostScript® page description language. But it will make a little more sense once you understand that PDF files follow a set pattern. If you were to open a PDF file in a text editor like Notepad, the contents may look like junk and probably not very interesting.
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