specify editor for ADE Explorer documents

It uses the freedesktop style file association database of your underlying desktop system.
How to add/modify the file associations via GUI depends on your window/file manager;
e.g. in KDE its in the Menu -> System Settings -> File Associations.
Other option is to manually edit the local user database in ~/.local/share/applications (or edit the global database for all users).
An overview can be found e.g. on www.freedesktop.org/.../


Regards,

It uses the freedesktop style file association database of your underlying desktop system.
How to add/modify the file associations via GUI depends on your window/file manager;
e.g. in KDE its in the Menu -> System Settings -> File Associations.
Other option is to manually edit the local user database in ~/.local/share/applications (or edit the global database for all users).
An overview can be found e.g. on www.freedesktop.org/.../


Regards,

Thanks!  It's working now.  In case someone else is looking or I find my own question in 5 years:

mkdir -p ~/.local/share/mime/packages/ 

cat > ~/.local/share/mime/packages/application-x-ocean.xml <<EOF

<?xml version="1.0" encoding="UTF-8"?>
  <mime-info xmlns="">www.freedesktop.org/.../shared-mime-info">
  <mime-type type="application/x-ocean">
    <comment>Cadence Ocean File</comment>
    <glob pattern="*.ocn"/>
  </mime-type>
</mime-info>

EOF

cp ~/.local/share/mime/packages/application-x-ocean.xml ~/.local/share/mime/packages/application-x-skill.xml
cp ~/.local/share/mime/packages/application-x-ocean.xml ~/.local/share/mime/packages/'application-x-skill++.xml'

# edit the SKILL and SKILL++ files to set extensions to .il and .ils respectively and change from

# Ocean to SKILL and SKILL++
vi ~/.local/share/mime/packages/application-x-skill*

mkdir -p ~/.local/share/applications/

cat > ~/.local/share/applications/ocean-editor.desktop << EOF

[Desktop Entry]
Type=Application
MimeType=application/x-ocean
Name=Cadence Ocean
Exec=xemacs

EOF
cp ~/.local/share/applications/ocean-editor.desktop ~/.local/share/applications/skill-editor.desktop
cp ~/.local/share/applications/ocean-editor.desktop ~/.local/share/applications/skill++-editor.desktop
vi ~/.local/share/applications/skill*.desktop

update-mime-database ~/.local/share/mime
update-desktop-database ~/.local/share/applications

# check 

gio mime application/x-ocean
gio mime application/x-skill
gio mime application/x-skillx
gio mime application/x-skill++

touch /tmp/myfile.ocn
gio info /tmp/myfile.ocn | grep "standard::content-type"

Thanks again for pointing me in the right direction.

-Dan

Thanks.  That worked.  I added a longer reply detailing exactly what I did for it to work but it triggered some sort of content filter.  

Thanks Dan. This went into moderation because the repeated text causes the forum software to consider it as potentially spam. I was on vacation and not reading emails, so only just saw this...