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50 most prevalent formats in KB e-Depot by file extension, based on March 2014 count. Use scrollbar at bottom to display remarks column to the right.
Extension Number of files in e-Depot ID(s) Tika Remarks
gif 34499095 - image/gif GIF image
xml 12913388 - application/xml XML (mostly metadata)
jpg 8197415 N/A* JPEG image
sml 7744829 - image/gif GIF image with unusual extension
pdf 7577414 - application/pdf PDF
raw 2045662 - text/plain Text file
tif 715509 - image/tiff TIFF image
oa3 296101 - text/plain Looks like SGML (oases, Kluwer). See also: Publisher Data Formats. Metadata.
doc 134732 - application/msword MS Word document
htm 103009 - text/html HTML
html 52016 - application/x-bzip2
- text/html
HTML. One .html file in dataset is actually a BZIP2 file.
wav 46796 - audio/x-wav Waveform Audio File Format audio
mp3 41931 - audio/mpeg MP3 audio
docx 40342 - application/vnd.openxmlformats-officedocument.wordprocessingml.document Office Open XML document
txt 40239 - text/plain Plain text
bmp 39927 - image/x-ms-bmp Windows Bitmap
swf 32816 - application/x-shockwave-flash Shockwave Flash
xls 31181 - application/vnd.ms-excel
- application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
MS Excel and Office Open XML Spreadsheet
lmx 25429 - application/xml XML (metadata)
zip 20008 - application/zip ZIP
class 19091 - application/java-vm Java Class File
epq 15238 - text/plain Looks like RTF fragments wrapped in something else
js 13441 - application/javascript JavaScript
mp4 13353 - video/mp4 MP4 video
xlsx 13088 - application/vnd.openxmlformats-officedocument.spreadsheetml.sheet Office Open XML Spreadsheet
rtf 12289 - application/rtf Rich Text Format
suppl 10926 - text/plain
- text/html
Looks like malformed html, sometimes with XML declaration. Files refer to supplemental files through hyperlinks.
mov 9904 - video/quicktime
- video/mpeg
MPEG video
png 9037 - image/png PNG image
abg 8910 - application/octet-stream Strange format; only 1 sample in dataset. Possible relation with Abakt backup tool, which used the same extension: http://www.gorearicayparinacota.cl/softwarelibre/Abakt/Abakt.html
avi 8662 - video/x-msvideo
- audio/x-wav
- video/mp4
Audio Video Interleave (AVI)
ppt 8324 - application/vnd.ms-powerpoint MS PowerPoint
dat 7870 - application/octet-stream
- text/plain
Diverse mix: checked files include measurement data in plain text, binary data and some system/configuration file.
mpg 7599 - video/mpeg
- video/x-msvideo
MPEG video
aif 6655 - audio/x-aiff AIFF audio
cab 6611 - application/vnd.ms-cab-compressed
- text/plain
Microsoft Cabinet file: http://en.wikipedia.org/wiki/Cabinet_%28file_format%29; 1 file in test dataset contains plain text
page 5672 - application/xml XML
tiff 5623 - image/tiff TIFF image
exe 3724 - application/x-dosexec
- application/x-msdownload; format=pe32
- text/plain
Windows executables. One file in test dataset actually contains plain text.
pptx 3400 - application/vnd.openxmlformats-officedocument.presentationml.presentation Office Open XML Powerpoint presentation
dll 3332 - application/x-msdownload; format=pe32
- application/x-msdownload
Windows Dynamic-link library
jpeg 3107 - image/jpeg JPEG image
ini 2896 - text/x-ini Mostly Windows configuration files
dib 2381 - image/x-ms-bmp Windows Bitmap image
x32 2171 - application/x-msdownload
- application/x-msdownload; format=pe32
Windows executable or DLL. Ther .x32 extension is also used for Macromedia plugins
db 2021 - application/octet-stream
- application/x-tika-msoffice
Unix File identifies most of these files as -application/CDFV2-corrupt-. Might be (possibly corrupted) thumbs.db files (which are also based on the OLE2 container format, corresponding to -application/x-tika-msoffice-). See also: http://apps.nationalarchives.gov.uk/PRONOM/Format/proFormatSearch.aspx?status=detailReport&id=1481
fig 1822 - application/x-xfig
- image/jpeg
One JPEG image aside, these files are all identified as application/x-xfig (Fig format), but this is incorrect! Actually they are MATLAB Figure files.
inf 1759 - text/plain Samples are all Autorun or Setup files, see: http://fileformats.archiveteam.org/wiki/Ext:inf
drv 1656 - application/x-msdownload
- application/octet-stream
- application/x-msdownload; format=pe32
Most likely Windows system driver files: http://fileformats.archiveteam.org/wiki/Dynamic-link_library_%28Windows%29
phd 1593 - text/html Based on tags in the sample file this looks more like it's SGML instead.
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