模組:Wikidata

文档图示 模块文档[查看] [编辑] [历史] [清除缓存]

方法

“Wikidata”模块包含下列方法,将属性ID作为首个参数提供,可从维基数据中检索任何属性的值:

  • getValue:以wiki内链形式返回值(如果适用)。其他值的输出类似{{#property:}},但如果值有首选等级则值返回有首选等级的值。与w:ru:Модуль:WikidataformatStatements不同,getValue不获取任何参考资料(另见w:en:Module talk:Wikidata/Archive 1#Why the references from Wikidata get dropped?)。
  • getRawValue:返回的属性值不加内链,数字使用千位分隔符。将数量属性的数值返回为纯数字。其他值的输出类似{{#property:}},包括一般的值,即使存在首选的值。
  • getDateValue:返回经过格式化的日期。默认格式[日 月 年];可选添加第三个参数来指定格式:[月 日, 年]用"mdy";"my"仅有月和年;"y"则仅有年。A further optional parameter, which must be fourth, such as "BCE", may be added to override the default "BC" that is suffixed for dates BC.
  • getImages:返回特定属性的所有图像。例如图像 (P18),基因图谱图像 (P692)等。参数为| propertyID | value / FETCH_WIKIDATA / nil | separator (default=space) | size (default=220px). The returned text will be in the format [[File:Filename | size]] for each image with a selectable size and separator (which may be html). If a property is supplied that is not of type "commonsMedia", it will return empty text.
  • getUnits:需要将表示数量的一个属性ID作为第一个参数,返回该属性在当前页面上使用的单位的名称。属性非数量类型或者未设置时返回空。如果第二个参数不是"FETCH_WIKIDATA",则会使用该参数代替从维基数据获取值。
  • getUnitID:同上,但返回单位的QID。

可以通过以下方法检索维基数据的限定符值(如果存在):

  • getQualifierValue:返回有wiki链接(内链)的值,如果适用。
  • getRawQualifierValue:返回非内链格式的值
  • getQualifierDateValue:返回格式化后的日期

如果调用此代码的条目在维基数据中没有定义属性,则返回一个空字符串("")。

其他方法:

  • pageId:返回当前页面的维基数据ID(QID),如果未链接维基数据则什么也不返回。使用{{#invoke:ResolveEntityId|page}}获取其他页面的QID。
  • getTAValue:获取P1323属性的TA98值(《解剖学术语》第一版 1998)。它不需要参数,并将其输出构造为列表,每个值都链接到外部资源。这是编写需要返回外部链接的函数的示例。
  • ViewSomething:获取结构化数据中的任何内容,包括标签、描述、参考资料和跨wiki链接。另见[1]
  • getSiteLink:获取一个页面在参数指定的某个wiki中的名称(例如"enwikiquote"对应英文维基语录,"arwiki"对应阿拉伯语维基百科)。
  • Dump: {{#invoke:Wikidata|Dump|claims}} 用来探查结构化数据。参数与ViewSomething相同。仅通过预览查看此调用的结果。这对开发访问数据的Lua脚本大有帮助。如果不带参数使用,会转储所有内容,包括标签、描述、参考资料和跨wiki链接。封装模板另见{{Dump}}。
  • getImageLegend:返回图像图例(非P18属性,而是P2096属性)。
    Call as {{#invoke:Wikidata |getImageLegend | <PARAMETER> | lang=<ISO-639code> |id=<QID>}}
    Returns PARAMETER, unless it is equal to "FETCH_WIKIDATA", from Item QID (expensive call). If QID is omitted or blank, the current article is used (not an expensive call). If lang is omitted, it uses the local wiki language, otherwise it uses the provided ISO-639 language code.
    The label is returned from the first image with 'preferred' rank; or from the first image with 'normal' rank if no image has preferred rank.
  • getValueShortName:与getValue返回的数据相同,但尽可能运用简称属性作为标签。这样可以让管道链接首选使用较短的文字标签。如果项没有短名称,则使用普通的标签。

访问其他QID

2015年9月16日起,可以通过其他条目的QID获取其他条目的数据。 调用如下:

  • {{#invoke:Wikidata|getValueFromID|<QID>|<属性>|FETCH_WIKIDATA}}

与getValue相同,但使用一个额外的参数表示要获取属性值的QID。 例如:

  • {{#invoke:Wikidata|getValueFromID|{{Get QID|理查德·伯顿}}|P26|FETCH_WIKIDATA}}

将从本维基百科中的标题为理查德·伯顿的页面对应的维基数据项(理查德·伯顿 (Q151973))中获取'配偶'(P26)列表,以内链形式展示。

如此,可以在用户命名空间中设置测试环境,但请注意,这些是“高成本”调用,请不要过度使用。

参数

  • 对一般用法(getValue),提供两个未命名参数。第一个是要检索的属性ID(例如P19对应出生地)。第二个参数可能为空、"FETCH_WIKIDATA",或者将作为返回值的其他字符串。
  • 对于一般的不加内链用法(getRawValue),提供两个未命名参数。第一个是要检索的属性ID(例如P21对应性别)。第二个参数可能为空、"FETCH_WIKIDATA",或者将作为返回值的其他字符串。
  • 对于一般的日期用法(getDateValue),提供三个未命名参数。第一个是要检索的属性ID(例如P569对应出生日期)。第二个参数可能为空、"FETCH_WIKIDATA",或者将作为返回值的其他字符串。第三个参数是返回的日期格式,可能为dmy, mdy, my或y(另见实际源码)。

请注意,wikibase调用不再支持小写参数:p123,因此如果出现问题,检查是否正确使用了大写参数(如P123)。

用法

例子:配偶 (P26)

  • {{#invoke:Wikidata|getValue|P26|}} = 不返回任何内容
  • {{#invoke:Wikidata|getValue|P26|FETCH_WIKIDATA}} = 返回内链形式的维基数据中存储的P26(配偶)属性
  • {{#invoke:Wikidata|getValue|P26|[[Hillary Rodham Clinton]]}} = 返回Hillary Rodham Clinton,即允许信息框使用本地自定义的值代替维基数据中的值。

信息框模板中使用

信息框的定义中可以这样调用:

  • | data55 = {{#invoke:Wikidata|getValue|P26|{{{spouse|FETCH_WIKIDATA}}} }}

使信息框变为:

  1. 信息框参数|spouse设为空(即"| spouse =")时,不显示spouse
  2. 未提供信息框参数|spouse时,根据维基数据内容显示内链形式的一个或多个值
  3. 本地提供信息框参数时,显示本地提供的参数|spouse。例如"|spouse = Hillary Rodham Clinton"

另一种方式:

  • | data55 = {{#invoke:Wikidata|getValue|P26|{{{spouse|}}} }}

使信息框变为:

  1. 信息框参数|spouse设为空(即"| spouse =")时,不显示spouse
  2. 未提供信息框参数|spouse时,不显示spouse
  3. 本地提供信息框参数时,显示本地提供的参数|spouse。例如"|spouse = Hillary Rodham Clinton"
  4. 本地将信息框参数设为FETCH_WIKIDATA时,根据维基数据内容显示内链形式的一个或多个值

另见Module:WikidataIB版本,支持在每个条目上用本地参数定义:不显示的参数(黑名单);仅从维基数据自动获取哪些参数(白名单)。用它可以修改信息框而不对使用信息框的条目内容和效果产生任何修改,直至在条目中明确启用相应参数。

例子:出生地

方式如上所述:

  • {{#invoke:Wikidata|getValue|P19|}} = 不返回任何内容
  • {{#invoke:Wikidata|getValue|P19|FETCH_WIKIDATA}} = 返回内链形式的维基数据中存储的P19(出生地)属性,指向对应条目
  • {{#invoke:Wikidata|getValue|P19|[[Hope, Arkansas|Hope]]}} = 返回Hope,即允许信息框使用本地自定义的值代替维基数据中的值。

例子:性别

不希望返回内链形式的性别,因此使用:

  • - {{#invoke:Wikidata|getRawValue|P21|FETCH_WIKIDATA}}

例子:出生日期

使用dmy格式的出生日期则使用:

  • - {{#invoke:Wikidata|getDateValue|P569|FETCH_WIKIDATA|dmy}}

使用mdy格式的出生日期则使用:

  • - {{#invoke:Wikidata|getDateValue|P569|FETCH_WIKIDATA|mdy}}

仅获取出生年份:

  • - {{#invoke:Wikidata|getDateValue|P569|FETCH_WIKIDATA|y}}

获取出生年份(BC)但希望显示为BCE:

  • - {{#invoke:Wikidata|getDateValue|P569|FETCH_WIKIDATA|y|BCE}}

例子:链接到一个维基数据项

使用下列代码检索QID:

  • - {{#invoke:Wikidata|pageId}}

用wiki语法的内链链接到维基数据:

  • - [[d:{{#invoke:Wikidata|pageId}}|Name of Link]]

例子:链接到另一个wiki页面

链接到另一个wiki站点,此例为英文维基导游:

  • - [[voy:{{#invoke:Wikidata|getSiteLink|enwikivoyage}}|Name of Link]]


测试

配偶

复制并粘贴下列代码到任何条目并预览(请勿保存!):

 * - {{#invoke:Wikidata|getValue|P26|}}
 * - {{#invoke:Wikidata|getValue|P26|FETCH_WIKIDATA}}
 * - {{#invoke:Wikidata|getValue|P26|[[希拉里·克林顿]]}}

比尔·克林顿中可以看到:

但在贝拉克·奥巴马中:

理查德·伯顿中:


弗朗茨·卡夫卡中则是:

出生地

复制并粘贴下列代码到任何条目并预览(请勿保存!):

 * - {{#invoke:Wikidata|getValue|P19|}}
 * - {{#invoke:Wikidata|getValue|P19|FETCH_WIKIDATA}}
 * - {{#invoke:Wikidata|getValue|P19|[[纽波特]]}}

威廉·埃勒里中尝试,看到维基数据如何正确的消歧义。

测试getValue、getRawValue及getDateValue

复制并粘贴下列代码到任何条目并预览(请勿保存!):

 * - {{#invoke:Wikidata|getValue|P19|FETCH_WIKIDATA}}
 * - {{#invoke:Wikidata|getValue|P26|FETCH_WIKIDATA}}
 * - {{#invoke:Wikidata|getValue|P27|FETCH_WIKIDATA}}
 * - {{#invoke:Wikidata|getValue|P140|FETCH_WIKIDATA}}
 * - {{#invoke:Wikidata|getRawValue|P21|FETCH_WIKIDATA}}
 * - {{#invoke:Wikidata|getDateValue|P569|FETCH_WIKIDATA|dmy}}
 * - {{#invoke:Wikidata|getDateValue|P569|FETCH_WIKIDATA|mdy}}
 * - {{#invoke:Wikidata|getDateValue|P569|FETCH_WIKIDATA|y}}

如果存在,这分别会返回出生地、配偶、国籍、宗教、性别、出生日期(两种格式)、出生年份。

另见

-- vim: set noexpandtab ft=lua ts=4 sw=4:
require('Module:No globals')

local p = {}
local debug = false


------------------------------------------------------------------------------
-- module local variables and functions

local wiki =
{
	langcode = mw.language.getContentLanguage().code
}

-- internationalisation
local i18n =
{
	["errors"] =
	{
		["property-not-found"] = "Property not found.",
		["entity-not-found"] = "Wikidata entity not found.",
		["unknown-claim-type"] = "Unknown claim type.",
		["unknown-entity-type"] = "Unknown entity type.",
		["qualifier-not-found"] = "Qualifier not found.",
		["site-not-found"] = "Wikimedia project not found.",
		["unknown-datetime-format"] = "Unknown datetime format.",
		["local-article-not-found"] = "Article is not yet available in this wiki."
	},
	["datetime"] =
	{
		-- $1 is a placeholder for the actual number
		[0] = "$1 billion years",	-- precision: billion years
		[1] = "$100 million years",	-- precision: hundred million years
		[2] = "$10 million years",	-- precision: ten million years
		[3] = "$1 million years",	-- precision: million years
		[4] = "$100,000 years",		-- precision: hundred thousand years
		[5] = "$10,000 years",		-- precision: ten thousand years
		[6] = "$1 millennium",		-- precision: millennium
		[7] = "$1 century",			-- precision: century
		[8] = "$1s",				-- precision: decade
		-- the following use the format of #time parser function
		[9]  = "Y",					-- precision: year,
		[10] = "F Y",				-- precision: month
		[11] = "F j, Y",			-- precision: day
		[12] = "F j, Y ga",			-- precision: hour
		[13] = "F j, Y g:ia",		-- precision: minute
		[14] = "F j, Y g:i:sa",		-- precision: second
		["beforenow"] = "$1 BCE",	-- how to format negative numbers for precisions 0 to 5
		["afternow"] = "$1 CE",		-- how to format positive numbers for precisions 0 to 5
		["bc"] = '$1 "BCE"',		-- how print negative years
		["ad"] = "$1",				-- how print positive years
		-- the following are for function getDateValue() and getQualifierDateValue()
		["default-format"] = "dmy", -- default value of the #3 (getDateValue) or
									-- #4 (getQualifierDateValue) argument
		["default-addon"] = "BC",	-- default value of the #4 (getDateValue) or
									-- #5 (getQualifierDateValue) argument
		["prefix-addon"] = false,	-- set to true for languages put "BC" in front of the
									-- datetime string; or the addon will be suffixed
		["addon-sep"] = " ",		-- separator between datetime string and addon (or inverse)
		["format"] =				-- options of the 3rd argument
		{
			["mdy"] = "F j, Y",
			["my"] = "F Y",
			["y"] = "Y",
			["dmy"] = "j F Y",
			["ymd"] = "Y-m-d",
			["ym"] = "Y-m"
		}
	},
	["monolingualtext"] = '<span lang="%language">%text</span>',
	["warnDump"] = "[[Category:Called function 'Dump' from module Wikidata]]",
	["ordinal"] =
	{
		[1] = "st",
		[2] = "nd",
		[3] = "rd",
		["default"] = "th"
	}
}

--require("Module:i18n").loadI18n("Module:Wikidata/i18n", i18n)
-- got idea from [[:w:Module:Wd]]
local module_title; if ... == nil then
	module_title = mw.getCurrentFrame():getTitle()
else
	module_title = ...
end
require('Module:i18n').loadI18n(module_title..'-i18n', i18n)

-- this function needs to be internationalised along with the above:
-- takes cardinal numer as a numeric and returns the ordinal as a string
-- we need three exceptions in English for 1st, 2nd, 3rd, 21st, .. 31st, etc.
local function makeOrdinal (cardinal)
	local ordsuffix = i18n.ordinal.default
	if cardinal % 10 == 1 then
		ordsuffix = i18n.ordinal[1]
	elseif cardinal % 10 == 2 then
		ordsuffix = i18n.ordinal[2]
	elseif cardinal % 10 == 3 then
		ordsuffix = i18n.ordinal[3]
	end
	-- In English, 1, 21, 31, etc. use 'st', but 11, 111, etc. use 'th'
	-- similarly for 12 and 13, etc.
	if (cardinal % 100 == 11) or (cardinal % 100 == 12) or (cardinal % 100 == 13) then
		ordsuffix = i18n.ordinal.default
	end
	return tostring(cardinal) .. ordsuffix
end

local function printError(code)
	return '<span class="error">' .. (i18n.errors[code] or code) .. '</span>'
end
local function parseDateFormat(f, timestamp, addon, prefix_addon, addon_sep) 
	local year_suffix
	local tstr = ""
	local lang_obj = mw.language.new(wiki.langcode)
	local f_parts = mw.text.split(f, 'Y', true)
	for idx, f_part in pairs(f_parts) do
		year_suffix = ''
		if string.match(f_part, "x[mijkot]$") then
			-- for non-Gregorian year
			f_part = f_part .. 'Y'
		elseif idx < #f_parts then
			-- supress leading zeros in year
			year_suffix = lang_obj:formatDate('Y', timestamp)
			year_suffix = string.gsub(year_suffix, '^0+', '', 1)
		end
		tstr = tstr .. lang_obj:formatDate(f_part, timestamp) .. year_suffix
	end
	if addon ~= "" and prefix_addon then
		return addon .. addon_sep .. tstr
	elseif addon ~= "" then
		return tstr .. addon_sep .. addon
	else
		return tstr
	end
end
local function parseDateValue(timestamp, date_format, date_addon)
	local prefix_addon = i18n["datetime"]["prefix-addon"]
	local addon_sep = i18n["datetime"]["addon-sep"]
	local addon = ""

	-- check for negative date
	if string.sub(timestamp, 1, 1) == '-' then
		timestamp = '+' .. string.sub(timestamp, 2)
		addon = date_addon
	end
	local _date_format = i18n["datetime"]["format"][date_format]
	if _date_format ~= nil then
		return parseDateFormat(_date_format, timestamp, addon, prefix_addon, addon_sep)
	else
		return printError("unknown-datetime-format")
	end
end

-- This local function combines the year/month/day/BC/BCE handling of parseDateValue{}
-- with the millennium/century/decade handling of formatDate()
local function parseDateFull(timestamp, precision, date_format, date_addon)
	local prefix_addon = i18n["datetime"]["prefix-addon"]
	local addon_sep = i18n["datetime"]["addon-sep"]
	local addon = ""

	-- check for negative date
	if string.sub(timestamp, 1, 1) == '-' then
		timestamp = '+' .. string.sub(timestamp, 2)
		addon = date_addon
	end

	-- get the next four characters after the + (should be the year now in all cases)
	-- ok, so this is dirty, but let's get it working first
	local intyear = tonumber(string.sub(timestamp, 2, 5))
	if intyear == 0 and precision <= 9 then
		return ""
	end

	-- precision is 10000 years or more
	if precision <= 5 then
		local factor = 10 ^ ((5 - precision) + 4)
		local y2 = math.ceil(math.abs(intyear) / factor)
		local relative = mw.ustring.gsub(i18n.datetime[precision], "$1", tostring(y2))
		if addon ~= "" then
			-- negative date
			relative = mw.ustring.gsub(i18n.datetime.beforenow, "$1", relative)
		else
			relative = mw.ustring.gsub(i18n.datetime.afternow, "$1", relative)
		end
		return relative
	end

	-- precision is decades (8), centuries (7) and millennia (6)
	local era, card
	if precision == 6 then
		card = math.floor((intyear - 1) / 1000) + 1
		era = mw.ustring.gsub(i18n.datetime[6], "$1", makeOrdinal(card))
	end
	if precision == 7 then
		card = math.floor((intyear - 1) / 100) + 1
		era = mw.ustring.gsub(i18n.datetime[7], "$1", makeOrdinal(card))
	end
	if precision == 8 then
		era = mw.ustring.gsub(i18n.datetime[8], "$1", tostring(math.floor(math.abs(intyear) / 10) * 10))
	end
	if era then
		if addon ~= "" then
			era = mw.ustring.gsub(mw.ustring.gsub(i18n.datetime.bc, '"', ""), "$1", era)
		else
			era = mw.ustring.gsub(mw.ustring.gsub(i18n.datetime.ad, '"', ""), "$1", era)
		end
		return era
	end

	local _date_format = i18n["datetime"]["format"][date_format]
	if _date_format ~= nil then
		-- check for precision is year and override supplied date_format
		if precision == 9 then
			_date_format = i18n["datetime"][9]
		end
		return parseDateFormat(_date_format, timestamp, addon, prefix_addon, addon_sep)
	else
		return printError("unknown-datetime-format")
	end
end

-- the "qualifiers" and "snaks" field have a respective "qualifiers-order" and "snaks-order" field
-- use these as the second parameter and this function instead of the built-in "pairs" function
-- to iterate over all qualifiers and snaks in the intended order.
local function orderedpairs(array, order)
	if not order then return pairs(array) end

	-- return iterator function
	local i = 0
	return function()
		i = i + 1
		if order[i] then
			return order[i], array[order[i]]
		end
	end
end

-- precision: 0 - billion years, 1 - hundred million years, ..., 6 - millennia, 7 - century, 8 - decade, 9 - year, 10 - month, 11 - day, 12 - hour, 13 - minute, 14 - second
local function normalizeDate(date)
	date = mw.text.trim(date, "+")
	-- extract year
	local yearstr = mw.ustring.match(date, "^\-?%d+")
	local year = tonumber(yearstr)
	-- remove leading zeros of year
	return year .. mw.ustring.sub(date, #yearstr + 1), year
end

local function formatDate(date, precision, timezone)
	precision = precision or 11
	local date, year = normalizeDate(date)
	if year == 0 and precision <= 9 then return "" end

	-- precision is 10000 years or more
	if precision <= 5 then
		local factor = 10 ^ ((5 - precision) + 4)
		local y2 = math.ceil(math.abs(year) / factor)
		local relative = mw.ustring.gsub(i18n.datetime[precision], "$1", tostring(y2))
		if year < 0 then
			relative = mw.ustring.gsub(i18n.datetime.beforenow, "$1", relative)
		else
			relative = mw.ustring.gsub(i18n.datetime.afternow, "$1", relative)
		end
		return relative
	end

	-- precision is decades, centuries and millennia
	local era
	if precision == 6 then era = mw.ustring.gsub(i18n.datetime[6], "$1", tostring(math.floor((math.abs(year) - 1) / 1000) + 1)) end
	if precision == 7 then era = mw.ustring.gsub(i18n.datetime[7], "$1", tostring(math.floor((math.abs(year) - 1) / 100) + 1)) end
	if precision == 8 then era = mw.ustring.gsub(i18n.datetime[8], "$1", tostring(math.floor(math.abs(year) / 10) * 10)) end
	if era then
		if year < 0 then era = mw.ustring.gsub(mw.ustring.gsub(i18n.datetime.bc, '"', ""), "$1", era)
		elseif year > 0 then era = mw.ustring.gsub(mw.ustring.gsub(i18n.datetime.ad, '"', ""), "$1", era) end
		return era
	end

	-- precision is year
	if precision == 9 then
		return year
	end

	-- precision is less than years
	if precision > 9 then
		--[[ the following code replaces the UTC suffix with the given negated timezone to convert the global time to the given local time
		timezone = tonumber(timezone)
		if timezone and timezone ~= 0 then
			timezone = -timezone
			timezone = string.format("%.2d%.2d", timezone / 60, timezone % 60)
			if timezone[1] ~= '-' then timezone = "+" .. timezone end
			date = mw.text.trim(date, "Z") .. " " .. timezone
		end
		]]--

		local formatstr = i18n.datetime[precision]
		if year == 0 then formatstr = mw.ustring.gsub(formatstr, i18n.datetime[9], "")
		elseif year < 0 then
			-- Mediawiki formatDate doesn't support negative years
			date = mw.ustring.sub(date, 2)
			formatstr = mw.ustring.gsub(formatstr, i18n.datetime[9], mw.ustring.gsub(i18n.datetime.bc, "$1", i18n.datetime[9]))
		elseif year > 0 and i18n.datetime.ad ~= "$1" then
			formatstr = mw.ustring.gsub(formatstr, i18n.datetime[9], mw.ustring.gsub(i18n.datetime.ad, "$1", i18n.datetime[9]))
		end
		return mw.language.new(wiki.langcode):formatDate(formatstr, date)
	end
end

local function printDatavalueEntity(data, parameter)
	-- data fields: entity-type [string], numeric-id [int, Wikidata id]
	local id

	if data["entity-type"] == "item" then id = "Q" .. data["numeric-id"]
	elseif data["entity-type"] == "property" then id = "P" .. data["numeric-id"]
	else return printError("unknown-entity-type")
	end

	if parameter then
		if parameter == "link" then
			local linkTarget = mw.wikibase.sitelink(id)
			local linkName = mw.wikibase.label(id)
			if linkTarget then
				-- if there is a local Wikipedia article link to it using the label or the article title
				return "[[" .. linkTarget .. "|" .. (linkName or linkTarget) .. "]]"
			else
				-- if there is no local Wikipedia article output the label or link to the Wikidata object to let the user input a proper label
				if linkName then return linkName else return "[[:d:" .. id .. "|" .. id .. "]]" end
			end
		else
			return data[parameter]
		end
	else
		return mw.wikibase.label(id) or id
	end
end

local function printDatavalueTime(data, parameter)
	-- data fields: time [ISO 8601 time], timezone [int in minutes], before [int], after [int], precision [int], calendarmodel [wikidata URI]
	--   precision: 0 - billion years, 1 - hundred million years, ..., 6 - millennia, 7 - century, 8 - decade, 9 - year, 10 - month, 11 - day, 12 - hour, 13 - minute, 14 - second
	--   calendarmodel: e.g. http://www.wikidata.org/entity/Q1985727 for the proleptic Gregorian calendar or http://www.wikidata.org/wiki/Q11184 for the Julian calendar]
	if parameter then
		if parameter == "calendarmodel" then data.calendarmodel = mw.ustring.match(data.calendarmodel, "Q%d+") -- extract entity id from the calendar model URI
		elseif parameter == "time" then data.time = normalizeDate(data.time) end
		return data[parameter]
	else
		return formatDate(data.time, data.precision, data.timezone)
	end
end

local function printDatavalueMonolingualText(data, parameter)
	-- data fields: language [string], text [string]
	if parameter then
		return data[parameter]
	else
		local result = mw.ustring.gsub(mw.ustring.gsub(i18n.monolingualtext, "%%language", data["language"]), "%%text", data["text"])
		return result
	end
end

local function findClaims(entity, property)
	if not property or not entity or not entity.claims then return end

	if mw.ustring.match(property, "^P%d+$") then
		-- if the property is given by an id (P..) access the claim list by this id
		return entity.claims[property]
	else
		property = mw.wikibase.resolvePropertyId(property)
		if not property then return end

		return entity.claims[property]
	end
end

local function getSnakValue(snak, parameter)
	if snak.snaktype == "value" then
		-- call the respective snak parser
		if snak.datavalue.type == "string" then return snak.datavalue.value
		elseif snak.datavalue.type == "globecoordinate" then return printDatavalueCoordinate(snak.datavalue.value, parameter)
		elseif snak.datavalue.type == "quantity" then return printDatavalueQuantity(snak.datavalue.value, parameter)
		elseif snak.datavalue.type == "time" then return printDatavalueTime(snak.datavalue.value, parameter)
		elseif snak.datavalue.type == "wikibase-entityid" then return printDatavalueEntity(snak.datavalue.value, parameter)
		elseif snak.datavalue.type == "monolingualtext" then return printDatavalueMonolingualText(snak.datavalue.value, parameter)
		end
	end
	return mw.wikibase.renderSnak(snak)
end

local function getQualifierSnak(claim, qualifierId)
	-- a "snak" is Wikidata terminology for a typed key/value pair
	-- a claim consists of a main snak holding the main information of this claim,
	-- as well as a list of attribute snaks and a list of references snaks
	if qualifierId then
		-- search the attribute snak with the given qualifier as key
		if claim.qualifiers then
			local qualifier = claim.qualifiers[qualifierId]
			if qualifier then return qualifier[1] end
		end
		return nil, printError("qualifier-not-found")
	else
		-- otherwise return the main snak
		return claim.mainsnak
	end
end

local function getValueOfClaim(claim, qualifierId, parameter)
	local error
	local snak
	snak, error = getQualifierSnak(claim, qualifierId)
	if snak then
		return getSnakValue(snak, parameter)
	else
		return nil, error
	end
end

local function getReferences(frame, claim)
	local result = ""
	-- traverse through all references
	for ref in pairs(claim.references or {}) do
		local refparts
		-- traverse through all parts of the current reference
		for snakkey, snakval in orderedpairs(claim.references[ref].snaks or {}, claim.references[ref]["snaks-order"]) do
			if refparts then refparts = refparts .. ", " else refparts = "" end
			-- output the label of the property of the reference part, e.g. "imported from" for P143
			refparts = refparts .. tostring(mw.wikibase.label(snakkey)) .. ": "
			-- output all values of this reference part, e.g. "German Wikipedia" and "English Wikipedia" if the referenced claim was imported from both sites
			for snakidx = 1, #snakval do
				if snakidx > 1 then refparts = refparts .. ", " end
				refparts = refparts .. getSnakValue(snakval[snakidx])
			end
		end
		if refparts then result = result .. frame:extensionTag("ref", refparts) end
	end
	return result
end

local function parseInput(frame)
	local qid = frame.args.qid
	if qid and (#qid == 0) then qid = nil end
	local propertyID = mw.text.trim(frame.args[1] or "")
	local input_parm = mw.text.trim(frame.args[2] or "")
	if input_parm ~= "FETCH_WIKIDATA" then
		return false, input_parm, nil, nil
	end
	local entity = mw.wikibase.getEntityObject(qid)
	local claims
	if entity and entity.claims then
		claims = entity.claims[propertyID]
		if not claims then
			return false, "", nil, nil
		end
	else
		return false, "", nil, nil
	end
	return true, entity, claims, propertyID
end
local function isType(claims, type)
	return claims[1] and claims[1].mainsnak.snaktype == "value" and claims[1].mainsnak.datavalue.type == type
end
local function getValue(entity, claims, propertyID, delim, labelHook) 
	if labelHook == nil then
		labelHook = function (qnumber)
			return nil;
		end
	end
	if isType(claims, "wikibase-entityid") then
		local out = {}
		for k, v in pairs(claims) do
			local qnumber = "Q" .. v.mainsnak.datavalue.value["numeric-id"]
			local sitelink = mw.wikibase.sitelink(qnumber)
			local label = labelHook(qnumber) or mw.wikibase.label(qnumber) or qnumber
			if sitelink then
				out[#out + 1] = "[[" .. sitelink .. "|" .. label .. "]]"
			else
				out[#out + 1] = "[[:d:" .. qnumber .. "|" .. label .. "]]<abbr title='" .. i18n["errors"]["local-article-not-found"] .. "'>[*]</abbr>"
			end
		end
		return table.concat(out, delim)
	else
		-- just return best values
		return entity:formatPropertyValues(propertyID).value
	end
end

------------------------------------------------------------------------------
-- module global functions

if debug then
	function p.inspectI18n(frame)
		local val = i18n
		for _, key in pairs(frame.args) do
			key = mw.text.trim(key)
			val = val[key]
		end
		return val
	end
end

function p.descriptionIn(frame)
	local langcode = frame.args[1]
	local id = frame.args[2]
	-- return description of a Wikidata entity in the given language or the default language of this Wikipedia site
	return mw.wikibase.getEntityObject(id).descriptions[langcode or wiki.langcode].value
end

function p.labelIn(frame)
	local langcode = frame.args[1]
	local id = frame.args[2]
	-- return label of a Wikidata entity in the given language or the default language of this Wikipedia site
	return mw.wikibase.getEntityObject(id).labels[langcode or wiki.langcode].value
end

-- This is used to get a value, or a comma separated list of them if multiple values exist
p.getValue = function(frame)
	local delimdefault = ", " -- **internationalise later**
	local delim = frame.args.delimiter or ""
	delim = string.gsub(delim, '"', '')
	if #delim == 0 then
		delim = delimdefault
	end
	local go, errorOrentity, claims, propertyID = parseInput(frame)
	if not go then
		return errorOrentity
	end
	return getValue(errorOrentity, claims, propertyID, delim)
end

-- Same as above, but uses the short name property for label if available.
p.getValueShortName = function(frame)
	local go, errorOrentity, claims, propertyID = parseInput(frame)
	if not go then
		return errorOrentity
	end
	local entity = errorOrentity
	-- if wiki-linked value output as link if possible
	local function labelHook (qnumber)
		local label
		local claimEntity = mw.wikibase.getEntity(qnumber)
		if claimEntity ~= nil then
			if claimEntity.claims.P1813 then
				for k2, v2 in pairs(claimEntity.claims.P1813) do
					for _, variant in ipairs{"zh", "zh-hans", "zh-hant", "zh-cn", "zh-hk", "zh-mo", "zh-sg", "zh-tw"} do
						if v2.mainsnak.datavalue.value.language == variant then
							label = v2.mainsnak.datavalue.value.text
						end
					end
				end
			end
		end
		if label == nil or label == "" then return nil end
		return label
	end
	return getValue(errorOrentity, claims, propertyID, ", ", labelHook);
end

-- This is used to get a value, or a comma separated list of them if multiple values exist
-- from an arbitrary entry by using its QID.
-- Use : {{#invoke:Wikidata|getValueFromID|<ID>|<Property>|FETCH_WIKIDATA}}
-- E.g.: {{#invoke:Wikidata|getValueFromID|Q151973|P26|FETCH_WIKIDATA}} - to fetch value of 'spouse' (P26) from 'Richard Burton' (Q151973)
-- Please use sparingly - this is an *expensive call*.
p.getValueFromID = function(frame)
	local itemID = mw.text.trim(frame.args[1] or "")
	local propertyID = mw.text.trim(frame.args[2] or "")
	local input_parm = mw.text.trim(frame.args[3] or "")
	if input_parm == "FETCH_WIKIDATA" then
		local entity = mw.wikibase.getEntity(itemID)
		local claims
		if entity and entity.claims then
			claims = entity.claims[propertyID]
		end
		if claims then
			return getValue(entity, claims, propertyID, ", ")
		else
			return ""
		end
	else
		return input_parm
	end
end
local function getQualifier(frame, outputHook) 
	local propertyID = mw.text.trim(frame.args[1] or "")
	local qualifierID = mw.text.trim(frame.args[2] or "")
	local input_parm = mw.text.trim(frame.args[3] or "")
	if input_parm == "FETCH_WIKIDATA" then
		local entity = mw.wikibase.getEntityObject()
		if entity.claims[propertyID] ~= nil then
			local out = {}
			for k, v in pairs(entity.claims[propertyID]) do
				for k2, v2 in pairs(v.qualifiers[qualifierID]) do
					if v2.snaktype == 'value' then
						out[#out + 1] = outputHook(v2);
					end
				end
			end
			return table.concat(out, "、"), true
		else
			return "", false
		end
	else
		return input_parm, false
	end
end
p.getQualifierValue = function(frame)
	local function outputValue(value)
		local qnumber = "Q" .. value.datavalue.value["numeric-id"]
		if (mw.wikibase.sitelink(qnumber)) then
			return "[[" .. mw.wikibase.sitelink(qnumber) .. "]]"
		else
			return "[[:d:" .. qnumber .. "|" ..qnumber .. "]]<abbr title='" .. i18n["errors"]["local-article-not-found"] .. "'>[*]</abbr>"
		end
	end
	return (getQualifier(frame, outputValue))
end

-- This is used to get a value like 'male' (for property p21) which won't be linked and numbers without the thousand separators
p.getRawValue = function(frame)
	local go, errorOrentity, claims, propertyID = parseInput(frame)
	if not go then
		return errorOrentity
	end
	local entity = errorOrentity
	local result = entity:formatPropertyValues(propertyID, mw.wikibase.entity.claimRanks).value
	-- if number type: remove thousand separators, bounds and units
	if isType(claims, "quantity") then
		result = mw.ustring.gsub(result, "(%d),(%d)", "%1%2")
		result = mw.ustring.gsub(result, "(%d)±.*", "%1")
	end
	return result
end

-- This is used to get the unit name for the numeric value returned by getRawValue
p.getUnits = function(frame)
	local go, errorOrentity, claims, propertyID = parseInput(frame)
	if not go then
		return errorOrentity
	end
	local entity = errorOrentity
	local result = entity:formatPropertyValues(propertyID, mw.wikibase.entity.claimRanks).value
	if isType(claims, "quantity") then
		result = mw.ustring.sub(result, mw.ustring.find(result, " ")+1, -1)
	end
	return result
end

-- This is used to get the unit's QID to use with the numeric value returned by getRawValue
p.getUnitID = function(frame)
	local go, errorOrentity, claims = parseInput(frame)
	if not go then
		return errorOrentity
	end
	local entity = errorOrentity
	local result
	if isType(claims, "quantity") then
		-- get the url for the unit entry on Wikidata:
		result = claims[1].mainsnak.datavalue.value.unit
		-- and just reurn the last bit from "Q" to the end (which is the QID):
		result = mw.ustring.sub(result, mw.ustring.find(result, "Q"), -1)
	end
	return result
end

p.getRawQualifierValue = function(frame)
	local function outputHook(value)
		if value.datavalue.value["numeric-id"] then
			return mw.wikibase.label("Q" .. value.datavalue.value["numeric-id"])
		else
			return value.datavalue.value
		end
	end
	local ret, gotData = getQualifier(frame, outputHook)
	if gotData then
		ret = string.upper(string.sub(ret, 1, 1)) .. string.sub(ret, 2)
	end
	return ret
end

-- This is used to get a date value for date_of_birth (P569), etc. which won't be linked
-- Dates and times are stored in ISO 8601 format (sort of).
-- At present the local formatDate(date, precision, timezone) function doesn't handle timezone
-- So I'll just supply "Z" in the call to formatDate below:
p.getDateValue = function(frame)
	local date_format = mw.text.trim(frame.args[3] or i18n["datetime"]["default-format"])
	local date_addon = mw.text.trim(frame.args[4] or i18n["datetime"]["default-addon"])
	local go, errorOrentity, claims = parseInput(frame)
	if not go then
		return errorOrentity
	end
	local entity = errorOrentity
	local out = {}
	for k, v in pairs(claims) do
		if v.mainsnak.datavalue.type == 'time' then
			local timestamp = v.mainsnak.datavalue.value.time
			local dateprecision = v.mainsnak.datavalue.value.precision
			-- A year can be stored like this: "+1872-00-00T00:00:00Z",
			-- which is processed here as if it were the day before "+1872-01-01T00:00:00Z",
			-- and that's the last day of 1871, so the year is wrong.
			-- So fix the month 0, day 0 timestamp to become 1 January instead:
			timestamp = timestamp:gsub("%-00%-00T", "-01-01T")
			out[#out + 1] = parseDateFull(timestamp, dateprecision, date_format, date_addon)
		end
	end
	return table.concat(out, "、")
end
p.getQualifierDateValue = function(frame)
	local date_format = mw.text.trim(frame.args[4] or i18n["datetime"]["default-format"])
	local date_addon = mw.text.trim(frame.args[5] or i18n["datetime"]["default-addon"])
	local function outputHook(value)
		local timestamp = value.datavalue.value.time
		return parseDateValue(timestamp, date_format, date_addon)
	end
	return (getQualifier(frame, outputHook))
end

-- This is used to fetch all of the images with a particular property, e.g. image (P18), Gene Atlas Image (P692), etc.
-- Parameters are | propertyID | value / FETCH_WIKIDATA / nil | separator (default=space) | size (default=frameless)
-- It will return a standard wiki-markup [[File:Filename | size]] for each image with a selectable size and separator (which may be html)
-- e.g. {{#invoke:Wikidata|getImages|P18|FETCH_WIKIDATA}}
-- e.g. {{#invoke:Wikidata|getImages|P18|FETCH_WIKIDATA|<br>|250px}}
-- If a property is chosen that is not of type "commonsMedia", it will return empty text.
p.getImages = function(frame)
	local sep = mw.text.trim(frame.args[3] or " ")
	local imgsize = mw.text.trim(frame.args[4] or "frameless")
	local go, errorOrentity, claims = parseInput(frame)
	if not go then
		return errorOrentity
	end
	local entity = errorOrentity
	if (claims[1] and claims[1].mainsnak.datatype == "commonsMedia") then
		local out = {}
		for k, v in pairs(claims) do
			local filename = v.mainsnak.datavalue.value
			out[#out + 1] = "[[File:" .. filename .. "|" .. imgsize .. "]]"
		end
		return table.concat(out, sep)
	else
		return ""
	end
end

-- This is used to get the TA98 (Terminologia Anatomica first edition 1998) values like 'A01.1.00.005' (property P1323)
-- which are then linked to http://www.unifr.ch/ifaa/Public/EntryPage/TA98%20Tree/Entity%20TA98%20EN/01.1.00.005%20Entity%20TA98%20EN.htm
-- uses the newer mw.wikibase calls instead of directly using the snaks
-- formatPropertyValues returns a table with the P1323 values concatenated with ", " so we have to split them out into a table in order to construct the return string
p.getTAValue = function(frame)
	local ent = mw.wikibase.getEntityObject()
	local props = ent:formatPropertyValues('P1323')
	local out = {}
	local t = {}
	for k, v in pairs(props) do
		if k == 'value' then
			t = mw.text.split( v, ", ")
			for k2, v2 in pairs(t) do
				out[#out + 1] = "[http://www.unifr.ch/ifaa/Public/EntryPage/TA98%20Tree/Entity%20TA98%20EN/" .. string.sub(v2, 2) .. "%20Entity%20TA98%20EN.htm " .. v2 .. "]"
			end
		end
	end
	local ret = table.concat(out, "<br> ")
	if #ret == 0 then
		ret = "Invalid TA"
	end
	return ret
end

--[[
This is used to return an image legend from Wikidata
image is property P18
image legend is property P2096

Call as {{#invoke:Wikidata |getImageLegend | <PARAMETER> | lang=<ISO-639code> |id=<QID>}}
Returns PARAMETER, unless it is equal to "FETCH_WIKIDATA", from Item QID (expensive call)
If QID is omitted or blank, the current article is used (not an expensive call)
If lang is omitted, it uses the local wiki language, otherwise it uses the provided ISO-639 language code
ISO-639: https://docs.oracle.com/cd/E13214_01/wli/docs92/xref/xqisocodes.html#wp1252447

Ranks are: 'preferred' > 'normal'
This returns the label from the first image with 'preferred' rank
Or the label from the first image with 'normal' rank if preferred returns nothing
Ranks: https://www.mediawiki.org/wiki/Extension:Wikibase_Client/Lua
]]

p.getImageLegend = function(frame)
	-- look for named parameter id; if it's blank make it nil
	local id = frame.args.id
	if id and (#id == 0) then
		id = nil
	end

	-- look for named parameter lang
	-- it should contain a two-character ISO-639 language code
	-- if it's blank fetch the language of the local wiki
	local lang = frame.args.lang
	if (not lang) or (#lang < 2) then
		lang = mw.language.getContentLanguage().code
	end

	-- first unnamed parameter is the local parameter, if supplied
	local input_parm = mw.text.trim(frame.args[1] or "")
	if input_parm == "FETCH_WIKIDATA" then
		local ent = mw.wikibase.getEntityObject(id)
		local imgs
		if ent and ent.claims then
			imgs = ent.claims.P18
		end
		local imglbl
		if imgs then
			-- look for an image with 'preferred' rank
			for k1, v1 in pairs(imgs) do
				if v1.rank == "preferred" and v1.qualifiers and v1.qualifiers.P2096 then
					local imglbls = v1.qualifiers.P2096
					for k2, v2 in pairs(imglbls) do
						if v2.datavalue.value.language == lang then
							imglbl = v2.datavalue.value.text
							break
						end
					end
				end
			end
			-- if we don't find one, look for an image with 'normal' rank
			if (not imglbl) then
				for k1, v1 in pairs(imgs) do
					if v1.rank == "normal" and v1.qualifiers and v1.qualifiers.P2096 then
						local imglbls = v1.qualifiers.P2096
						for k2, v2 in pairs(imglbls) do
							if v2.datavalue.value.language == lang then
								imglbl = v2.datavalue.value.text
								break
							end
						end
					end
				end
			end
		end
		return imglbl
	else
		return input_parm
	end
end

-- This is used to get the QIDs of all of the values of a property, as a comma separated list if multiple values exist
-- Usage: {{#invoke:Wikidata |getPropertyIDs |<PropertyID> |FETCH_WIKIDATA}}
-- Usage: {{#invoke:Wikidata |getPropertyIDs |<PropertyID> |<InputParameter> |qid=<QID>}}

p.getPropertyIDs = function(frame)
	local go, errorOrentity, propclaims = parseInput(frame)
	if not go then
		return errorOrentity
	end
	local entity = errorOrentity
	-- if wiki-linked value collect the QID in a table
	if (propclaims[1] and propclaims[1].mainsnak.snaktype == "value" and propclaims[1].mainsnak.datavalue.type == "wikibase-entityid") then
		local out = {}
		for k, v in pairs(propclaims) do
			out[#out + 1] = "Q" .. v.mainsnak.datavalue.value["numeric-id"]
		end
		return table.concat(out, "、")
	else
		-- not a wikibase-entityid, so return empty
		return ""
	end
end

-- returns the page id (Q...) of the current page or nothing of the page is not connected to Wikidata
function p.pageId(frame)
	local entity = mw.wikibase.getEntityObject()
	if not entity then return nil else return entity.id end
end

function p.claim(frame)
	local property = frame.args[1] or ""
	local id = frame.args["id"]
	local qualifierId = frame.args["qualifier"]
	local parameter = frame.args["parameter"]
	local list = frame.args["list"]
	local references = frame.args["references"]
	local showerrors = frame.args["showerrors"]
	local default = frame.args["default"]
	if default then showerrors = nil end

	-- get wikidata entity
	local entity = mw.wikibase.getEntityObject(id)
	if not entity then
		if showerrors then return printError("entity-not-found") else return default end
	end
	-- fetch the first claim of satisfying the given property
	local claims = findClaims(entity, property)
	if not claims or not claims[1] then
		if showerrors then return printError("property-not-found") else return default end
	end

	-- get initial sort indices
	local sortindices = {}
	for idx in pairs(claims) do
		sortindices[#sortindices + 1] = idx
	end
	-- sort by claim rank
	local comparator = function(a, b)
		local rankmap = { deprecated = 2, normal = 1, preferred = 0 }
		local ranka = rankmap[claims[a].rank or "normal"] .. string.format("%08d", a)
		local rankb = rankmap[claims[b].rank or "normal"] .. string.format("%08d", b)
		return ranka < rankb
	end
	table.sort(sortindices, comparator)

	local result
	local error
	if list then
		local value
		-- iterate over all elements and return their value (if existing)
		result = {}
		for idx in pairs(claims) do
			local claim = claims[sortindices[idx]]
			value, error = getValueOfClaim(claim, qualifierId, parameter)
			if not value and showerrors then value = error end
			if value and references then value = value .. getReferences(frame, claim) end
			result[#result + 1] = value
		end
		result = table.concat(result, list)
	else
		-- return first element
		local claim = claims[sortindices[1]]
		result, error = getValueOfClaim(claim, qualifierId, parameter)
		if result and references then result = result .. getReferences(frame, claim) end
	end

	if result then return result else
		if showerrors then return error else return default end
	end
end

-- look into entity object
function p.ViewSomething(frame)
	local f = (frame.args[1] or frame.args.id) and frame or frame:getParent()
	local id = f.args.id
	if id and (#id == 0) then
		id = nil
	end
	local data = mw.wikibase.getEntityObject(id)
	if not data then
		return nil
	end

	local i = 1
	while true do
		local index = f.args[i]
		if not index then
			if type(data) == "table" then
				return mw.text.jsonEncode(data, mw.text.JSON_PRESERVE_KEYS + mw.text.JSON_PRETTY)
			else
				return tostring(data)
			end
		end

		data = data[index] or data[tonumber(index)]
		if not data then
			return
		end

		i = i + 1
	end
end

-- getting sitelink of a given wiki
-- get sitelink of current item if qid not supplied
function p.getSiteLink(frame)
	local qid = frame.args.qid
	if qid == "" then qid = nil end
	local f = mw.text.trim( frame.args[1] or "")
	local entity = mw.wikibase.getEntity(qid)
	if not entity then
		return
	end
	local link = entity:getSitelink( f )
	if not link then
		return
	end
	return link
end

function p.Dump(frame)
	local f = (frame.args[1] or frame.args.id) and frame or frame:getParent()
	local data = mw.wikibase.getEntityObject(f.args.id)
	if not data then
		return i18n.warnDump
	end

	local i = 1
	while true do
		local index = f.args[i]
		if not index then
			return "<pre>"..mw.dumpObject(data).."</pre>".. i18n.warnDump
		end

		data = data[index] or data[tonumber(index)]
		if not data then
			return i18n.warnDump
		end

		i = i + 1
	end
end

return p