Module documentation[view] [edit] [history] [purge]This module can be used to quickly add a new unit for use with {{convert}}. When satisfied that a unit is working correctly, ask at Module talk:Convert for the unit to be moved to the permanent list of units.
See Template:Convert/unit sandbox for a good way to prepare unit definitions that can be copied into this page.
The following extracts from Module:Convert/data show examples that could be used to define a new unit. Any number of spaces can be used where blanks are shown in the following.
Examples for additions to
Module:Convert/extra (For the actual module code see below) |
|---|
-- These are EXAMPLES on the documentation page. Scroll down to see the module content.
local extra_units = {
-- Similar to a redirect: "sqm" is an alias for "m2".
-- {{convert|1.5|m2|sp=us}} → 1.5 square meters (16 sq ft)
-- {{convert|1.5|sqm|sp=us}} → 1.5 square meters (16 sq ft)
["sqm"] = {
target = "m2",
},
-- A simple unit, showing the minimum that is required.
-- The "ha" is the unit code used to identify the unit:
-- {{convert|1.5|ha}} → 1.5 hectares (3.7 acres)
["ha"] = {
name1 = "hectare",
symbol = "ha",
utype = "area",
scale = 10000,
default = "acre",
},
-- A unit which accepts an SI prefix. There is no "name1" field because it
-- has to be constructed (mJ gives "millijoule"; MJ gives "megajoule").
-- {{convert|125|kJ}} → 125 kilojoules (30,000 cal)
["J"] = {
_name1 = "joule",
_symbol = "J",
utype = "energy",
scale = 1,
prefixes = 1,
default = "cal",
link = "Joule",
},
-- A unit where US and plural names are required.
-- {{convert|125|cm/s2}} → 125 centimetres per second squared (4.1 ft/s²)
["cm/s2"] = {
name1 = "centimetre per second squared",
name1_us = "centimeter per second squared",
name2 = "centimetres per second squared",
name2_us = "centimeters per second squared",
symbol = "cm/s<sup>2</sup>",
utype = "acceleration",
scale = 0.01,
default = "ft/s2",
link = "Gal (unit)",
},
-- A "per" unit is defined as the ratio of two other units.
-- {{convert|125|g/cm3}} → 125 grams per cubic centimetre (4.5 lb/cu in)
["g/cm3"] = {
per = { "g", "cm3" },
utype = "density",
default = "lb/cuin",
},
-- If the automatic "per" link is not wanted, a link can be specified.
-- {{convert|125|g/cm3|lk=on|disp=unit}} → [[gram]]s per [[cubic centimetre]]
-- {{convert|125|g/m3|lk=on|disp=unit}} → [[density|grams per cubic metre]]
["g/m3"] = {
per = { "g", "m3" },
utype = "density",
default = "lb/cuyd",
link = "density",
},
-- Characters "$" and "£" are recognized as currency symbols.
-- {{convert|125|$/acre}} → $125 per acre ($310/ha)
["$/acre"] = {
per = { "$", "acre" },
utype = "cost $ per unit area",
default = "$/ha",
},
-- An output unit can be defined as a combination of existing units.
-- {{convert|2|ha|ft2 m2}} → 2 hectares (220,000 sq ft; 20,000 m²)
-- Any number of output units can be specified.
-- NOTE: There may be no need to define a combination because a convert
-- can specify the output by joining unit codes with "+":
-- {{convert|1.2|acre|ft2+yd2+m2}} → 1.2 acres (52,000 sq ft; 5,800 sq yd; 4,900 m²)
["ft2 m2"] = {
combination = { "ft2", "m2" },
utype = "area",
},
-- An output unit can be defined using subunits (from least to most significant).
-- {{convert|90|in|ydftin}} → 90 inches (2 yd 1 ft 6 in)
["ydftin"] = {
combination = { "in", "ft", "yd" },
multiple = { 12, 3 },
utype = "length",
},
}
|
| Field | Description |
|---|---|
symbol |
Unit identifier used when abbr=on is in effect.
|
name1 |
Singular name of the unit used when abbr=off is in effect.
|
name2 |
Plural name of the unit; not required if it is the same as name1 plus "s".
|
name1_us |
Singular name when sp=us is in effect; not required if the same as name1.
|
name2_us |
Plural name when sp=us is in effect; not required if the same as name1_us plus "s".
|
utype |
Unit type; must be exactly the same as the utype of any other unit used in a conversion.
|
scale |
Number of base units in the unit being defined. |
default |
Unit code of the default output used when no output unit is specified in a conversion. |
target |
Unit code of an existing unit (the unit being defined "redirects" to the existing unit). |
prefixes |
Use 1 if an SI prefix is accepted; 2 is used for m2, and 3 is used for m3.
|
link |
Article title used when lk=on is in effect; not required if it is the same as name1.
|
--[=[ Extra conversion data used by Module:Convert.
[[Module:Convert/data]] defines all units and is transcluded in all pages
where [[Module:Convert]] is used. Testing new units by editing that module
would invalidate the cache for all affected pages.
For quick changes and experiments with new units, this module can be edited.
Since this module would be transcluded in only a small number of pages,
changes should cause little server overhead and should propagate quickly.
]=]
local extra_units = {
-- TODO: Remove following tests.
["RDF"] = { target = "DF" }, -- redirect to new unit defined below
["RM"] = { target = "m" }, -- redirect to "m" in [[Module:Convert/data]]
["xyz"] = { target = "xyz" },
["J/DM"] = {
per = { "J", "DM" },
utype = "energy per unit length",
default = "kJ/km",
},
["DF"] = {
name1 = "double foot",
name2 = "double feet",
symbol = "dft",
utype = "length",
scale = 0.6096,
default = "m",
},
["DM"] = {
_name1 = "double metre",
_name1_us = "double meter",
_symbol = "Dm",
utype = "length",
scale = 2,
prefixes = 1,
default = "v > 0 and v < 1.5 ! ftin ! ft",
link = "Double metre",
},
["ina"] = {
name1 = "inch",
name2 = "inches",
symbol = '<abbr title="inches">in</abbr>',
utype = "length",
scale = 0.0254,
exception = "subunit_more_precision",
default = "mm",
},
["$/km"] = {
per = { "$", "km" },
utype = "cost $ per unit length",
default = "$/mi",
},
["$/mi"] = {
per = { "$", "mi" },
utype = "cost $ per unit length",
default = "$/km",
},
}
return { extra_units = extra_units }