The Object Type Authority List provides data values for the Object Type element.
ASCII Text
Audio/Visual (RealMedia Video Stream)
Audio/Visual File (AVI)
Audio/Visual File (MOV)
Audio/Visual File (MP4)
Audio/Visual (MPG)
Audio/Visual File (WMV)
Binary
Comma-separated values (CSV)
EBCDIC Binary
EBCDIC Text
Executable program (EXE)
HTML
Image (BMP)
Image (GIF)
Image (JP2)
Image (JPG)
Image (PNG)
Image (SVG)
Image (TIFF)
JavaScript Object Notation File (JSON)
Microsoft Excel Spreadsheet
Microsoft PowerPoint Document
Microsoft Publisher Document
Microsoft Word Document
Microsoft Write Document
OpenDocument Graphic File (ODG)
OpenDocument Presentation File (ODP)
OpenDocument Spreadsheet File (ODS)
OpenDocument Text File (ODT)
Portable Document File (PDF)
Rich Text Format (RTF)
SAP
Shapefile
SIARD (Software Independent Archiving of Relational Databases File)
Sound File (MP3)
Sound File (WAV)
Visio
World Wide Web Page
XML - Extensible Markup Language
ZIP