| FileToImagesConsts | File to image operation consts. |
| FileToImagesRequest | File to images request. |
| FileToImagesWebProxy | Прокси для обращения к веб-сервису документов для конвертации файлов. |
| NumberRange | Pages range in a python slice style (with negative indexes). |
| PdfVersion | PDF version to convert with unoconv. Use 0 for PDF 1.4 (by default) and 1 for PDF/A-1 (ISO 19005-1:2005). |