Available encoding formats for PDF. 
- Enumerator: 
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| ePDFPr_Default | =0: Default encoding mode (choose best internal representation for non-binary data). Input data is analyzed and text, numeric or binary compaction mode will be used accordingly (to produce the smallest symbol). |  | ePDFPr_Binary | =1: Binary Encoding (faster if binary data is to be encoded). Encoding will be in binary mode without further data analysis. |