Open Discover® SDK  - A .NET file format identification and text, metadata, and attachment extraction API 

Notable supported file types for identification and content extraction

For complete list of file formats identified (1,330+) and supported levels of content extraction see Open Discover SDK Supported Formats v2019.2.pdf.

File Type ClassificationFile Types
Archive7Z, ZIP, RAR, RAR5, TAR, XAR, BZ2, Z, ARJ, CAB, GZIP, MS BINDER, HQX, MSO, CPIO, LZH, XAR, XZ, AppleSingle1, AppleSingle2
  • Split archive formats 7Z, ZIP, RAR are supported
  • 7Z, ZIP, RAR are supported for password decryption
  • Self-extracting 7Z, ZIP, RAR executables are also supported
Mail StorePST, OST, OST 2013, MBOX, DBX
Media ImageWIM, ISO, HFS, HFS+, DMG, UDF, VHD, VDI, QCOW, VMDK 1-5
  • Split WIM media image format is supported
Document ExchangePDF, PDF Portfolio, PDF XFA, PDF AcroForm, XPS, RTF
  • PDF types are supported for password decryption*
  • Embedded item extraction supported for RTF
EmailMSG, EML, EMLX, TNEF, DXL, ICS, VCF, P7M, P7S, TextMail
  • S/MIME digitally-signed and encrypted emails are supported
  • TextMail is email saved as text (e.g., via Outlook email client). See “Text” file type classification for the various encodings that are recognized for TextMail
Word ProcessingDOC, DOCX, DOCM, DOTX, DOTM, ODT, OTT, WPS, HWP3, HPW5, Apple iWork Pages ’05-’09, Ichitaro 5-8
  • Word saved as 2003, 2007 XML is supported
  • Ichitaro 8 Compressed is not yet supported
PresentationPPT, PPTX, PPTM, PPSX, POTX, PPSM, ODP, OTP, SHOW (Hanshow), Apple iWork Keynote ’05-’09
  • PowerPoint formats 97-2003 and 2007-2016 are supported for password decryption*
  • PowerPoint saved as XML is supported
  • Open Document (LibreOffice/OpenOffice) formats with encryption (Blowfish/AES) are supported for password decryption
SpreadsheetsXLS, XLSX, XLSB, XLSM, XLTX, XLTM, XLAM, CELL (Hancell), ODS, OTS, Apple iWork Numbers ’05-’09
  • Excel formats 97-2003 and 2007-2016 are supported for password decryption*
  • Open Document (LibreOffice/OpenOffice) formats with encryption (Blowfish/AES) are supported for password decryption
Raster ImageJPG, TIFF, PNG, GIF, ARW, CRW, NEF, RW2, ORF, WEBP
Vector ImageVSD, VSDX, VSDM, VSSX, VDX, ODG, OTG, ODC, WMF, WMZ, EMF, EMZ
  • Open Document (LibreOffice/OpenOffice) formats with encryption (Blowfish/AES) are supported for password decryption
MultimediaMP3, MP4, WMV, WEBM, MOV
MarkupHTML, XHTML, HTM, XML, MHT
  • Metadata extraction supported
  • Embedded item extraction supported for MHT
  • MS Office 97-2003, 2007+ documents saved as HTML, MHT, or XML are identified as such and text and metadata are extracted (e.g., see file format Id.PowerPointMhtml and Id.PowerPointXml)
Notes and ResearchOneNote 2010, 2013, and 2016
  • OneNote 2007 is not yet supported; however, embedded item extraction and binary-to text is supported.
  • Password decryption for OneNote 2010-2016 is not yet supported
TextSupported encodings for identification and extraction: ASCII, UTF-7, UTF-8, UTF-16LE, UTF-16BE, UTF-32LE, UTF-32BE, 1250, 1251, 1253, 1254, 1255, 1256, 8859-1, 8859-2, 8859-5, 8859-6, 8859-7, 8859-8, 8859-9, KOI8-R, SHIFT-JIS, EUC-JP, ISO-2022-JP, EUC-KR, ISO-2022-KR, ISO-2022-CN, Big5, GB18030, IBM 424, IBM 420, IBM 866, EBCDIC 500
  • All encoded text is converted to a .NET Unicode string
Project ManagementMPP: Microsoft Project 97-2003, 2007-2016 supports metadata, embedded item extraction, and limited text extraction
DatabaseDomino XML document database (.dxl;.xml)

*DRM or custom encryption is not supported. Excel and PowerPoint 97-2003 formats that are protected with default password are automatically decrypted, no password is required.

In addition to the above notable supported file formats, Open Discover SDK offers a binary-to-text content extractor for formats that are not supported. The binary-to-text content extractor “scrapes” out text in UTF-8, UTF-16, and code page 1252 encodings. UTF-8 “scraping” supports all language code ranges while UTF-16 and code page 1252 only support “Latin” encodings. In many cases useful text for indexing can be extracted via binary-to-text extraction.

Gallery of SDK Examples

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