JabRef renders the DOI in General -> DOI - Example DOI: 10.1038/ejcn.2011.64

(See this: Open JabRef -> "New example library" -> "Tokede_2011")

JabRef allows to shorten the doi using the cleanup dialog: (Quality -> cleanup entries)

Result:

10/bt29n7

Although this is technically OK, there should be a better way: A button "shorten" at the DOI editor

Task:

1. Copy IdentifierEditor.fxml to DoiIdentifierEditor.fxml
2. Add button "shortenDoi" (you need to find a nice glyph)
3. Copy IdentifierEditor.java to new package org.jabref.gui.fieldeditors.identifier.doi to DoiEditor
4. Move DoiIdentifierEditorViewModel to the new package
5. Remove doi logic from org.jabref.gui.fieldeditors.identifier.IdentifierEditor
6. Adapt DoiEditor to contain the new button w/ the shortDoi functionality7. Add an if at org.jabref.gui.fieldeditors.FieldEditors#getForField before fieldProperties.contains(FieldProperty.IDENTIFIER to return the DoiEditor