BUR #28757 has been rejected.
create implication pen_(medium) -> ink_(medium)
create implication color_ink_(medium) -> ink_(medium)
create implication calligraphy_brush_(medium) -> ink_(medium)
create implication print_(medium) -> ink_(medium)
remove implication marker_(medium) -> traditional_media
create implication marker_(medium) -> ink_(medium)
remove implication ballpoint_pen_(medium) -> traditional_media
create implication ballpoint_pen_(medium) -> pen_(medium)
remove implication millipen_(medium) -> traditional_media
create implication millipen_(medium) -> pen_(medium)
remove implication nib_pen_(medium) -> traditional_media
create implication nib_pen_(medium) -> pen_(medium)
I feel that it makes sense to organize all of the ink-based traditional media. This has been mentioned before in topic #21476. Most of the pen types are hard to differentiate visually and the default should be pen_(medium) unless a more specific type is identified (tag/artist commentary, visual inspection, art_tools_in_frame). Several other mediums also use ink and are included in these implications. Main problem would be a chain of 3 implications for a metatag if that is undesirable (ie. millipen_(medium) -> pen_(medium) -> ink_(medium) -> traditional_media).
Explanations
1. Pens use ink
2. Color ink is a type of ink
3. Calligraphy brushes are used to apply ink to some sort of paper
4. Prints use (rather thick) ink
5. Markers use ink
6-8. Usually visually ambiguous pen types