Hi Vadim,

On 22 Nov 2014, at 14:13, Vadim Bauer <[email protected]> wrote:

> - How is the the value 581.055 calculated? 

it is contained in the embedded font data; depending on what font type you are 
looking at, you will have to check it out in the resp. font specification.

> - Where is the section in the PDF Spec describing widts. 

see sections "9.6 Simple Fonts" and "9.7. Composite Fonts" in the PDF 
specification for PDF 1.7, aka ISO 32000-1:2008.

> - Is the spec freely available somewhere?


see http://bit.ly/1yE8KeU



Olaf


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