Nepomuk currently acts as the file indexer for KDE. Even though we frequently tout that we are not just a file indexer, we need to index the files properly.

File Indexing solutions

Strigi

KDE 4.9, currently uses libstreamanalyzer to index the files. Current problems with strigi -

Difficult to contribute to
No documentation
Un-maintained
Does not reuse libraries

Lists the current status of indexing different files.

Roll our own?

File Formats

We list down all the different file formats, and which all are supported by the different file indexing solutions.

Images

JPEG - Use exiv - strigi also uses exiv - currently broken
PNG - Strigi rolls its own - detects the application name, color depth and interlace mode as well
GIF - there isn't much metadata
EXIF
TIFF
BMP
SVG - Strigi stores them as plain text

We just just use exiv2 and cover almost everything. Plus the code would be super simple.

Videos

Audio

- MP3

Documents

- doc
- docx
- odf
- pdfs
- epub
- mobi
- spreadsheet formats
- Presentation Formats
- lyx
- tex
- cbz - Comic books

Archives
- tar
- gzip
- whatever ..

Emails
- There was a bug report

Text Files
- Text files
- Source Code

ISO images
Executable Files