C# .NET document parsing API to extract text, images, metadata & encoding from databases, PDF, Word, Excel, presentations, web, email, EPUB & zip file formats....XLSX, XLSM, XLSB, XLT, XLTX, XLTM, XLA, XLAM Presentations : PPT...RTF ODP XML HTML OTT GZ BZ2 XLTM XHTML CSV ODT XLS OTP XLSB XLT...