Hello,
I've tried to find out some possible (not necessary new?) issues with mimetype 
icons:

1. following icons could be created in a similar way as 'source-java':
- text-css - by including 'css' word
- text-sgml - by including 'sgml' word
- text-x-dtd - by including 'dtd' word

2. Using </> in 'text-xml' and 'xml' icons looks clever/innovative, but I 
believe staying with 'xml' text or at most, '<xml>' would help more users to 
recognize the icon and put it in their memory

3. text-x-csharp could made the same as source-csharp

3.1. text-x-adasrc could be created using 'ada' or 'Ada' text (yes, just 
'ada', because IIRC, unfortunately Ada programming language have no one 
standard for header/source filename extensions).

4. Consider having lowercase letters (like in 'source-java') instead of 
uppercase for all 'source-....' icons; 
In particular (at first contact, and IMHO): "PY" in 'source-py' and "H" in 
'source-h' icon looks exotic, compared to "py", and 'h', respectively.
That said I suspect the capitalization comes from crystalsvg theme.

4.1. 'text-x-pascal' icon could be created as "pas" (reusing filename 
extension) instead of "P"

5. Optionally: application-vnd.sun.xml.calc.svg and 
application-vnd.sun.xml.calc.template.svg could be made the same as 
application-vnd.oasis.opendocument.spreadsheet.svg and 
application-vnd.oasis.opendocument.spreadsheet-template.svg, respectively or 
even dropped -- I think that having '</>' sign makes the icon too detailed so 
for downscaling unnecessary work would be needed without clear benefit.

6. I would welcome application-vnd.oasis.opendocument.database-template 
icon with enthusiasm as there will be some database template files in use in 
KDE4.

By the way, thanks for the great improved database mimetype and Kexi app 
icons!

7. Spreadshets and presentations are also a part of OpenDocument so I guess 
the top-left "ODF" sign will be eventually present in  
application-vnd.oasis.opendocument.spreadsheet.svg and 
application-vnd.oasis.opendocument.presentation.svg too?

8. Generic 'spreadsheet' icon could be used for 'application-x-gnumeric', 
'pplication-x-quattropro', 'application-x-siag', and 
'application-x-applix-spreadsheet' because now these latter icons differ in 
style from all other spreadsheet icons (without clear reason?).

-- 
regards / pozdrawiam, Jaroslaw Staniek
 Sponsored by OpenOffice Polska (http://www.openoffice.com.pl/en) to work on
 Kexi & KOffice: http://www.kexi-project.org, http://www.koffice.org
 KDE3 & KDE4 Libraries for MS Windows: http://kdelibs.com, http://www.kde.org
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