Module:Convert/extra/sandbox: Difference between revisions

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.

The above documentation is transcluded from Module:Convert/extra/doc. (edit | history)
Editors can experiment in this module's sandbox (edit | diff) and testcases (create) pages.
Add categories to the /doc subpage. Subpages of this module.

-- 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 is transcluded in only a small number of pages, changes
-- should cause little server overhead and should propagate quickly.
--
-- If a unit is defined in the data module, any definition here is ignored,
-- so defining the same unit in both modules is not an error.
-- A unit defined here can refer to units that are also defined here, and
-- can refer to units defined in the data module.
--
-- Periodically, those extra units that are wanted permanently can be removed
-- from here after being added to [[Module:Convert/data]].

local extra_units = {
	["dpi"] = {
		name1    = "DPI",
		name2    = "DPI",
		symbol   = "DPI",
		utype    = "length",
		invert   = -1,
		iscomplex= true,
		scale    = 1/0.0254,
		default  = "pitch",
		link     = "Dots per inch",
	},
	-- the convention is that resolution appears as simply micrometers dimensionally
	-- see Digital Photogrammetry: A Practical Course by Wilfried Linder
	["pitch"] = {
		name1    = "µm",
		name2    = "µm",
		symbol   = "µm",
		utype    = "length",
		invert   = 1,
		scale    = 0.000001,
		default  = "dpi",
		link     = "Dots_per_inch#Proposed_metrication",
	},
	["dpcm"] = {
		name1    = "dot/cm",
		name2    = "dot/cm",
		symbol   = "dot/cm",
		utype    = "length",
		invert   = -1,
		iscomplex= true,
		scale    = 1/0.01,
		default  = "dpi",
		link     = "Dots_per_inch#Proposed_metrication",
	},
	["isp"] = {
		name1    = "second",
		name2    = "seconds";
		symbol   = "s",
		utype    = "speed",
		invert   = 1,
		scale    = 9.8066,
		default  = "km/s",
		link     = "specific impulse",
	},
	-- from F=ma, Ns/kg is equivalent to units of speed
	-- which is fortunate because convert couldn't handle it otherwise
	["Ns/kg"] = {
		name1    = "N-s/kg",
		name2    = "N-s/kg";
		symbol   = "N-s/kg",
		utype    = "speed",
		invert   = 1,
		scale    = 1,
		default  = "isp",
		link     = "specific impulse",
	},
	["kNs/kg"] = {
		name1    = "kN-s/kg",
		name2    = "kN-s/kg";
		symbol   = "kN-s/kg",
		utype    = "speed",
		invert   = 1,
		scale    = 1000,
		default  = "isp",
		link     = "specific impulse",
	},
	-- units of inverse speed, because invert is negative
	["si tsfc"] = {
		name1    = "g/(kN·s)",
		name2    = "g/(kN·s)",
		symbol   = "g/(kN·s)",
		utype    = "speed",
		invert   = -1,
		iscomplex= true,
		scale    = 1/101972/9.8066,
		default  = "tsfc",
		link     = "thrust specific fuel consumption",
	},
	-- units of inverse speed, because invert is negative
	["tsfc"] = {
		name1    = "lb/(lbf·h)",
		name2    = "lb/(lbf·h)",
		symbol   = "lb/(lbf·h)",
		utype    = "speed",
		invert   = -1,
		iscomplex= true,
		scale    = 1/9.8066/3600,
		default  = "si_tsfc",
		link     = "thrust specific fuel consumption",
	},
}

return { extra_units = extra_units }