Template:Infobox ship characteristics/paramline
For internal use by {{Template:Infobox ship characteristics}}:
- First parameter: infobox line label
- Second parameter: optional value for parameter
- if absent and no WD parameter: line is not displayed
- if absent and WD parameter: Wikidata is used to provide a value
- if "none": line is not displayed
- WD= optional Wikidata property (e.g. "ship class" or "P289")