Modulo:Biota infobox/taxonomy/pagipadasan

Dokumentasion ti modulo
require('strict');

--[[--------------------------< T A X O M A P >----------------------------------------------------------------

this is a table of sequence tables that each list the first and last taxon name in a particular module.  module_select()
uses these tables to determine which data module 'should' have the data for the taxon name.

	[1] first taxon name in the data module
	[3] suffix appended to the base module name to create: 'Module:Sandbox/trappist the monk/taxonomy <suffix>'

These tables are created by an awb script when it splits much larger raw data file before the splits are uploaded
to en.wiki.

]]

local taxomap_t = {		-- created/updated: 2021-10-24
	A = {
		{'ADA clade', 'Acratus', 'A1'},
		{'Acrecebus', 'Africotriton', 'A2'},
		{'Afrida', 'Alicia (plant)', 'A3'},
		{'Aliciella', 'Ammosperma', 'A4'},
		{'Ammospermophilus', 'Anenthemonae', 'A5'},
		{'Anentome', 'Aorangia', 'A6'},
		{'Aoranthe', 'Archarius', 'A7'},
		{'Archasia', 'Asemonea', 'A8'},
		{'Asemoneinae', 'Aurana', 'A9'},
		{'Auranticarpa', 'Azygopus', 'A10'},
		},
	B = {
		{'BOP clade', 'Bauruoolithus', 'B1'},
		{'Baurusuchia', 'Bloomeria', 'B2'},
		{'Blosnavirus', 'Brasilentulus', 'B3'},
		{'Brasileodactylus', 'Byturus', 'B4'},
		},
	C = {
		{'CRuMs', 'Camillina', 'C1'},
		{'Caminus', 'Cassianellidae', 'C2'},
		{'Cassianopsinae', 'Cereus', 'C3'},
		{'Cereus (anemone)', 'Chernes', 'C4'},
		{'Chernetidae', 'Chrysopida', 'C5'},
		{'Chrysopidae', 'Cnemidophorus', 'C6'},
		{'Cnemidopyge', 'Conopias', 'C7'},
		{'Conopidae', 'Crataegus ser. Intricata', 'C8'},
		{'Crataegus ser. Intricatae', 'Cunninghamella', 'C9'},
		{'Cunninghamellaceae', 'Czekanowskiales', 'C10'},
		},
	D = {
		{'Daanosaurus', 'Dentatherinidae', 'D1'},
		{'Dentectus', 'Digalodon', 'D2'},
		{'Digama', 'Dodecadenia', 'D3'},
		{'Dodecahema', 'Dystrophaeus', 'D4'},
		{'Dytaster', 'Dzungariotherium', 'D5'},
		},
	E = {
		{'Eacles', 'Empidadelpha', 'E1'},
		{'Empididae', 'Epipogiinae', 'E2'},
		{'Epipogium', 'Eucosmodon', 'E3'},
		{'Eucosmodontidae', 'Eutreptiidae', 'E4'},
		{'Eutreptiiida', 'Ezosciadium', 'E5'},
		},
	G = {
		{'Gabara', 'Giardia', 'G1'},
		{'Giardiavirus', 'Gonostomatidae', 'G2'},
		{'Gonostomatoidei', 'Gyroweisia', 'G3'},
		},
	H = {
		{'HTVC010P', 'Hecalini', 'H1'},
		{'Hecamede', 'Hesperonychus', 'H2'},
		{'Hesperoperla', 'Homalattus', 'H3'},
		{'Homalia', 'Hymenasplenium', 'H4'},
		{'Hymenelia', 'Hytrosaviridae', 'H5'},
		},
	L = {
		{'La', 'Lechia', 'L1'},
		{'Lechriaspis', 'Lethiscidae', 'L2'},
		{'Lethiscus', 'Lithophaga', 'L3'},
		{'Lithophane', 'Lycopteridae', 'L4'},
		{'Lycopteriformes', 'Lyttoniidina', 'L5'},
		},
	M = {
		{'Maaqwi', 'Manis (Manis)', 'M1'},
		{'Manis (Paramanis)', 'Megamastax', 'M2'},
		{'Megamelanus', 'Mesotitanina', 'M3'},
		{'Mesovagus', 'Microzercon', 'M4'},
		{'Microzoanthidae', 'Montfortia', 'M5'},
		{'Montfortista', 'Mytilaria', 'M6'},
		{'Mytilarioideae', 'minke whale species complex', 'M7'},
		},
	N = {
		{'Naashoibitosaurus', 'Neocoelidia', 'N1'},
		{'Neocoelidiinae', 'Nichollsemys', 'N2'},
		{'Nichollssaura', 'Nypa', 'N3'},
		{'Nypoideae', 'Nyungwea', 'N4'},
		},
	O = {
		{'OSLEUM', 'Ondigus', 'O1'},
		{'Ondina', 'Orthomorpha', 'O2'},
		{'Orthomorphini', 'Ozyptila', 'O3'},
		},
	P = {
		{'P2virus', 'Papaipema', 'P1'},
		{'Papakula', 'Parasynema', 'P2'},
		{'Parasynthemis', 'Peltandreae', 'P3'},
		{'Peltaria', 'Phaethornithinae', 'P4'},
		{'Phaetusa', 'Phyllocnistinae', 'P5'},
		{'Phyllocnistis', 'Planiliza', 'P6'},
		{'Planipapillus', 'Podothecus', 'P7'},
		{'Podothrombidiidae', 'Praezygaena', 'P8'},
		{'Pragmatodes', 'Protoazin', 'P9'},
		{'Protobalanus', 'Pseudomicrargus', 'P10'},
		{'Pseudomicrocentria', 'Ptychatractidae', 'P11'},
		{'Ptycheulimella', 'Pyxis', 'P12'},
		},
	S = {
		{'SAR', 'Scaptia', 'S1'},
		{'Scaptius', 'Seegeriella', 'S2'},
		{'Seeleyosaurus', 'Sinaivirus', 'S3'},
		{'Sinamma', 'Sphaeriida', 'S4'},
		{'Sphaeriidae', 'Stenogomphurus', 'S5'},
		{'Stenogonum', 'Stylonuroidea', 'S6'},
		{'Stylonuroides', 'Szovitsia', 'S7'},
		},
	T = {
		{'TG3', 'Tenthredo', 'T1'},
		{'Tentoriceps', 'Therizinosaurus', 'T2'},
		{'Therlinya', 'Torovirus', 'T3'},
		{'Torpedinidae', 'Trigonosaurus', 'T4'},
		{'Trigonoscuta', 'Typhlogarra', 'T5'},
		{'Typhlogastrura', 'Tzvelevopyrethrum', 'T6'},
		},
	}

local is_not_italic_virus_taxon_t = {
	['unranked domain'] = true,													-- taxon names assigned these ranks are *not* to be italicized
	['unranked'] = true,
	['virus group'] = true,
	['virus'] = true,
	['strain'] = true,
	['serotype'] = true,
	}

local is_italic_taxon_t = {														-- taxon names assigned these ranks are to be italicized
	['genus'] = true,
	['ichnogenus'] = true,
	['oogenus'] = true,
	['subgenus'] = true,
	['ichnosubgenus'] = true,
	['oosubgenus'] = true,

	['supersectio'] = true,
	['sectio'] = true,
	['subsectio'] = true,

	['series'] = true,
	['subseries'] = true,

	['species complex'] = true,
	['species group'] = true,
	['species subgroup'] = true,

	['species'] = true,
	['ichnospecies'] = true,
	['oospecies'] = true,
	['subspecies'] = true,
	['ichnosubspecies'] = true,
	['oosubspecies'] = true,
	}

local anglicize_rank_t = {														-- this table adapted from {{anglicise rank}}
	['alliance'] = '\'\'Alliance\'\'',											-- Special cases, alphabetic order
	['basic shell type'] = '\'\'Basic shell type\'\'',
	['branch'] = '\'\'Branch\'\'',
	['clade'] = '\'\'Clade\'\'',
	['cladus'] = '\'\'Clade\'\'',
	['form taxon'] = '\'\'Form taxon\'\'',
	['grade'] = '\'\'Grade\'\'',
	['gradus'] = '\'\'Grade\'\'',
	['informal'] = '\'\'Informal group\'\'',
	['informal group'] = '\'\'Informal group\'\'',
	['morphotype'] = '\'\'Morphotype\'\'',
	['node'] = '\'\'Node\'\'',
	['plesion'] = '\'\'Plesion\'\'',
	['plesion-group'] = '\'\'Plesion-group\'\'',
	['possible clade'] = '\'\'Clade?\'\'',
	['realm'] = '\'\'Realm\'\'',
	['species complex'] = '\'\'Species complex\'\'',
	['species group'] = '\'\'Species group\'\'',
	['species subgroup'] = '\'\'Species subgroup\'\'',
	['stem group'] = '\'\'Stem group\'\'',
	['total group'] = '\'\'Total group\'\'',
	['unranked'] = '(unranked)',												-- not a special case in {{anglicise rank}} but included here for convenience

	['serotype'] = 'Serotype',													-- Virus ranks below species
	['strain'] = 'Strain',
	['virus'] = 'Virus',
	['virus group'] = 'Group',

	['classis'] = 'Class',														-- Linnaean taxonomy, alphabetic order
	['cohort'] = 'Cohort',
	['divisio'] = 'Division',
	['domain'] = 'Domain',
	['epifamilia'] = 'Epifamily',
	['familia'] = 'Family',
	['forma'] = 'Form',
	['genus'] = 'Genus',
	['grandordo'] = 'Grandorder',
	['grandordo-mb'] = 'Grandorder',											-- McKenna & Bell version
	['hyperfamilia'] = 'Hyperfamily',
	['infraclassis'] = 'Infraclass',
	['infralegio'] = 'Infralegion',
	['infralegion'] = 'Infralegion',
	['infraordo'] = 'Infraorder',
	['infraphylum'] = 'Infraphylum',
	['infraregnum'] = 'Infrakingdom',
	['infratribus'] = 'Infratribe',
	['legio'] = 'Legion',
	['legion'] = 'Legion',
	['magnordo'] = 'Magnorder',
	['micrordo'] = 'Microrder',
	['microphylum'] = 'Microphylum',
	['mirordo-Mirorder'] = 'Mirorder',
	['mirordo-mb'] = 'Mirorder',												-- McKenna & Bell version
	['nanordo'] = 'Nanorder',
	['nanophylum'] = 'Nanophylum',
	['ordo'] = 'Order',
	['parafamilia'] = 'Parafamily',
	['parvclassis'] = 'Parvclass',
	['parvordo'] = 'Parvorder',
	['phylum'] = 'Phylum',
	['regnum'] = 'Kingdom',
	['sectio'] = 'Section',
	['series'] = 'Series',
	['species'] = 'Species',
	['subclassis'] = 'Subclass',
	['subcohort'] = 'Subcohort',
	['subdivisio'] = 'Subdivision',
	['subfamilia'] = 'Subfamily',
	['subgenus'] = 'Subgenus',
	['sublegio'] = 'Sublegion',
	['sublegion'] = 'Sublegion',
	['subordo'] = 'Suborder',
	['subphylum'] = 'Subphylum',
	['subregnum'] = 'Subkingdom',
	['subsectio'] = 'Subsection',
	['subseries'] = 'Subseries',
	['subspecies'] = 'Subspecies',
	['subterclassis'] = 'Subterclass',												-- used in WoRMS
	['subtribus'] = 'Subtribe',
	['superclassis'] = 'Superclass',
	['supercohort'] = 'Supercohort',
	['superdivisio'] = 'Superdivision',
	['superdomain'] = 'Superdomain',
	['superfamilia'] = 'Superfamily',
	['superlegio'] = 'Superlegion',
	['superlegion'] = 'Superlegion',
	['superordo'] = 'Superorder',
	['superphylum'] = 'Superphylum',
	['superregnum'] = 'Superkingdom',
	['supersectio'] = 'Supersection',
	['supertribus'] = 'Supertribe',
	['tribus'] = 'Tribe',
	['varietas'] = 'Variety',
	['zoodivisio'] = 'Division',
	['zoosectio'] = 'Section',
	['zoosubdivisio'] = 'Subdivision',
	['zoosubsectio'] = 'Subsection',

	['ichnoclassis'] = 'Ichnoclass',											--trace fossil taxonomy, alphabetic order
	['ichnocohort'] = 'Ichnocohort',
	['ichnodivisio'] = 'Ichnodivision',
	['ichnofamilia'] = 'Ichnofamily',
	['ichnogenus'] = 'Ichnogenus',
	['ichnograndordo'] = 'Ichnograndorder',
	['ichnograndordo-mb'] = 'Ichnograndorder',									--McKenna & Bell version-->
	['ichnoinfraclassis'] = 'Ichnoinfraclass',
	['ichnoinfradivisio'] = 'Ichnoinfradivision',
	['ichnoinfraordo'] = 'Ichnoinfraorder',
	['ichnolegio'] = 'Ichnolegion',
	['ichnolegion'] = 'Ichnolegion',
	['ichnomagnordo'] = 'Ichnomagnorder',
	['ichnomicrordo'] = 'Ichnomicrorder',
	['ichnoordo'] = 'Ichnoorder',
	['ichnoparvordo'] = 'Ichnoparvorder',
	['ichnospecies'] = 'Ichnospecies',
	['ichnostem-group'] = 'Ichnostem-Group',
	['ichnosubclassis'] = 'Ichnosubclass',
	['ichnosubdivisio'] = 'Ichnosubdivision',
	['ichnosubfamilia'] = 'Ichnosubfamily',
	['ichnosublegio'] = 'Ichnosublegion',
	['ichnosublegion'] = 'Ichnosublegion',
	['ichnosubordo'] = 'Ichnosuborder',
	['ichnosuperclassis'] = 'Ichnosuperclass',
	['ichnosupercohort'] = 'Ichnosupercohort',
	['ichnosuperfamilia'] = 'Ichnosuperfamily',
	['ichnosuperordo'] = 'Ichnosuperorder',

	['ooclassis'] = 'Ooclass',													--fossilized egg taxonomy, alphabetic order
	['oocohort'] = 'Oocohort',
	['oofamilia'] = 'Oofamily',
	['oogenus'] = 'Oogenus',
	['oomagnordo'] = 'Oomagnorder',
	['oordo'] = 'Oorder',
	['oospecies'] = 'Oospecies',
	['oosubclassis'] = 'Oosubclass',
	['oosubgenus'] = 'Oosubgenus',
	['oosubspecies'] = 'Oosubspecies',
	['oosupercohort'] = 'Oosupercohort',
	['oosuperordo'] = 'Oosuperorder',
	}

local is_always_displayed_t = {
	['virus_group'] = true,
	['regnum'] = true,
	['kingdom'] = true,
	['phylum'] = true,
	['divisio'] = true,
	['division'] = true,
	['class'] = true,
	['classis'] = true,
	['order'] = true,
	['ordo'] = true,
	['familia'] = true,
	['family'] = true,
	['genus'] = true,
	['species'] = true,
	}

local base_data_table_name = 'Modulo:Biota infobox/taxonomy ';		-- includes space between base name and suffix
local modules_loaded = {};														-- DEBUG: a list of the modules loaded while crawling the tree; viewable in the lua log


--[[--------------------------< M O D U L E _ S E L E C T >----------------------------------------------------

Select one data module to load that 'should' hold data for <taxon>.  Returns an enumerated letter suffix that
will be appended to the base module name to make: Module:Sandbox/trappist the monk/taxonomy <suffix>

]]

local function module_select (taxon)
	local letter = taxon:match ('^%a');											-- get the first character of the taxon name
	letter = (letter and letter:upper()) or 'symbols';							-- if a letter force uppercase; 'symbols' else

	if not taxomap_t[letter] then												-- if no table in <taxomap_t> for <letter>
		return letter;
	end

	for _, map_t in ipairs (taxomap_t[letter]) do								-- loop through the <letter> map table looking for the table that should hold <taxon>
		if (map_t[1] <= taxon) and (taxon <= map_t[2]) then						-- compare <taxon> against table's first and last entries
			return map_t[3];													-- should be here, return the enumerated letter
		end
	end
end


--[[--------------------------< T E M P L A T E _ D A T A _ G E T >--------------------------------------------

read taxon data from an existing template

template data are read from the template using the embedded {{Do not edit this line all}} template.  That template
returns '$' delimited string of parameter values:
	parent$rank$link_target$unnamed parameter$always_display$extinct$same_as$refs
This function builds a taxon_t table combining <link_target> and <unnamed parameter> into <taxon_t.link>; the
'boolean' parameter values for <always_display> and <extinct> are converted from case-insensitive 'yes' or 'true'
(as strings) to 'true' (a lua boolean); all other values for these parameters are converted to lua nil.

]]

local function template_data_get (taxon)
	local template_name = 'Plantilia:Taxonomy/' .. taxon .. '/pagipadasan';			-- DEBUG: make a template name from <taxon>
--	local template_name = 'Template:Taxonomy/' .. taxon;						-- make a template name from <taxon>
	local frame = mw.getCurrentFrame();											-- so that we can expand the taxonomy template

	local template_string;	

	-- using #ifexist bumps the expensive parser function counter but keeps nonexistent templates out of [[Wikipedia:Database reports/Transclusions of non-existent templates]]
	-- executing a nonexistent template inside a pcall transcludes the nonexistent template
	-- creating a title object with mw.title.new() or mw.title.makeTitle() transcludes the nonexistent title
	-- creating a title object and testing with .exists transcludes the nonexistent title and bumps the expensive parser function counter
	if 'true' == frame:callParserFunction ({name='#ifexist', args={template_name, 'true'}}) then--, 'false'}}) then
		template_string = frame:expandTemplate ({title=template_name, args={['machine code'] = 'all'}});	-- get $ delimited string of template parameter values
	else
		return;																	-- no template_name
	end

	local raw_taxon_t = mw.text.split (template_string, '$', true);				-- split the string into a sequence table
	local taxon_t = {};
	
	local param_names = {'parent', 'rank', 'link', '1', 'always_display', 'extinct', 'same_as', 'refs'};	-- list of taxonomy template parameter name
	for i, v in ipairs (raw_taxon_t) do											-- for each template parameter value
		if ('always_display' == param_names[i]) or ('extinct' == param_names[i]) then	-- these take 'boolean' 'yes' and 'true'
			v = ({['yes'] = true, ['true'] = true})[v:lower()];					-- convert case-insensitive 'yes' and 'true' (as strings) to boolean 'true'; nil else
		end
		
		if v and ('' ~= v) then													-- skip nil and empty string values
			if '1' == param_names[i] then										-- the link label positional parameter
				taxon_t.link = taxon_t.link .. '|' .. v;						-- gets appended to the link target
			else
				taxon_t[param_names[i]] = v;									-- add key and value
			end
		end
	end
	mw.log (template_name);														-- DEBUG
	return taxon_t;
end


--[[--------------------------< M O D U L E _ D A T A _ G E T >------------------------------------------------

read taxon data from a data module

data-module data are loaded into package.loaded{} with a pcall() wrapped call to require().  taxon and same_as
data are extracted from that table.  Successive calls to a data module do not unload and then reload that module.
Because Felis, Felinae, Felidae, and Feliformia are sequential in the taxonimic hierarchy, the 'F' data module
is loaded only once for those four taxa.  The 'new' data table is consulted before all other data tables, so it
is loaded once and not unloaded until _crawl_tree() terminates.

]]

local last_loaded_module;														-- module scope variable holds name of that last successfully loaded data module 

local function module_data_get (taxon, module_name)
	if 'Life' == taxon or 'Veterovata' == taxon or 'Ichnos' == taxon then		-- these are the taxonomy end taxons
		return {};																-- nowhere to go so return empty table
	end

	if (base_data_table_name .. 'new') ~= module_name then						-- 'new' loads once instead of every time so ignore it
		if last_loaded_module and (last_loaded_module ~= module_name) then		-- if different from currently loaded module
			package.loaded[last_loaded_module] = nil;							-- unload current module to conserve memory
			last_loaded_module = nil;											-- unset
		end
	end
	
	if package.loaded[module_name] then											-- has already been loaded
		return package.loaded[module_name][taxon];								-- return taxon data if present; nil else
	else
		if not pcall (require, module_name) then								-- attempt to load; data will be fetched from package.loaded[module_name]
			return nil;															-- failed to load
		else											
			local suffix = module_name:match ('taxonomy (.+)$');				-- DEBUG: was loaded; save module name for log
			modules_loaded['taxonomy ' .. suffix] = (modules_loaded['taxonomy ' .. suffix] and (modules_loaded['taxonomy ' .. suffix] + 1)) or 1;	-- DEBUG
			if 'new' ~= suffix then												-- not debug
				last_loaded_module = module_name;								-- remember this module name; 'taxonomy new' does not get 'remembered'
			end
		end

		return package.loaded[module_name][taxon];								-- return taxon data if present; nil else
	end
end


--[[--------------------------< S O U R C E _ D A T A _ G E T >------------------------------------------------

chooses which of module_data_get() or template_data_get() to call based on the state of <taxon_module_name>

]]

local function source_data_get (taxon, taxon_module_name)
	if taxon_module_name then
		return module_data_get (taxon, taxon_module_name);						-- get raw taxon data from a data module
	else
		return template_data_get (taxon);										-- get raw taxon data from a taxonomy template
	end
end


--[[--------------------------< _ T A X O N _ G E T >----------------------------------------------------------

fetch a taxon table from the appropriate taxonomy Template:Taxonomy/<taxon> template where <taxon> is the taxon
name we are looking for

or from '~/taxonomy <suffix>' data module where <suffix> is:
	the uppercase first letter of <taxon> name (may have enumerator digits)
	'symbols' when the first character of <taxon> name is not a letter
	'new' for the temporary data holding module between new template creation and integration into the whole data set

fills <taxon_t>; follows one 'same_as' if that parameter is present and <no_follow> is omitted, false, or nil

<taxon> is taxon name we are looking for
<no_follow> is boolean; true don't follow <same_as> taxon if present; false or missing or nil, follow <same_as> taxon if present
<taxon_module_name> is module name; used to unload module once we are done with it
<taxon_t> is the table to be filled from the taxon data and from the same_as taxon data

returns nothing; <taxon_t> has data on success or is empty table on failure

TODO: better error handling?

]]

local function _taxon_get (taxon, no_follow, taxon_module_name, taxon_t)
	local same_as;
	local raw_taxon_t = {};														-- holds the data read from the template or from the data module for <taxon>

	raw_taxon_t = source_data_get (taxon, taxon_module_name);					-- get raw taxon data from a taxonomy template or a data module; for templates taxon_module_name is nil

	if raw_taxon_t then
		for k, v in pairs (raw_taxon_t) do										-- copy content from <raw_taxon_t> into return table (<taxon_t>)
			if no_follow or ('same_as' ~= k)  then								-- but don't copy same_as data if present
				taxon_t[k] = v;
			else																-- here when same_as is present and following is allowed (no_follow is false)
				same_as = v;													-- so save same_as value for use later
			end
		end
		raw_taxon_t = nil;														-- unset
	else
		return;																	-- failure abandon; <taxon_t> has not been modified
	end

	if same_as then																-- if there is a same_as value in the taxonomy table
		if taxon_module_name then												-- nil when looking for template data
			local suffix = module_select (same_as);								-- make a <suffix> from the <same_as> taxon name
	
			taxon_module_name = base_data_table_name .. suffix;					-- make a data module name
		end
		raw_taxon_t = source_data_get (same_as, taxon_module_name);				-- get raw same_as taxon data
	end

	if same_as and raw_taxon_t then												-- if there is a <same_as> value and we have raw same_as data
		for k, v in pairs (raw_taxon_t) do										-- copy the same_as taxon data into <taxon_t>
			if not taxon_t[k] then												-- but do not overwrite parameter values already in <taxon_t>
				taxon_t[k] = v;
			end
		end
	end
end


--[[--------------------------< T A X O N _ G E T >------------------------------------------------------------

fetch a taxon table from the appropriate taxonomy template or '~/taxonomy <suffix>' data module where
<suffix> is:
	the uppercase first letter of <taxon> name (may have enumerator digits)
	'symbols' when the first character of <taxon> name is not a letter
	'new' for the temporary data holding module between new template creation and integration into the whole data set

follow one 'same_as' if that parameter is present

]]

local function taxon_get (taxon, no_follow)
	local taxon_t = {};															-- the return table

	if not taxon then
		return {};
	end

	_taxon_get (taxon, no_follow, nil, taxon_t);								-- attempts to fill <taxon_t> from Template:Taxonomy/<taxon>

	if next (taxon_t) then														-- if <taxon_t> not empty
		return taxon_t;															-- return it without suffix
	end

	local taxon_module_name = base_data_table_name .. 'new';					-- first look in the '~/Taxonomy new' data module
	_taxon_get (taxon, no_follow, taxon_module_name, taxon_t);					-- attempts to fill <taxon_t> from '~/Taxonomy new' data module

	if next (taxon_t) then														-- if <taxon_t> not empty
		return taxon_t, 'new';													-- return it with 'new' suffix
	end

	local suffix = module_select (taxon);										-- get the suffix to append to the base data module name
	taxon_module_name = base_data_table_name .. suffix;							-- not in '~/Taxonomy new' data module
	_taxon_get (taxon, no_follow, taxon_module_name, taxon_t);					-- attempts to fill <taxon_t> from '~/Taxonomy <suffix>' data module

	return taxon_t, suffix;
end


--[[--------------------------< I S _ S E T >------------------------------------------------------------------

Returns true if argument is set; false otherwise. Argument is 'set' when it exists (not nil) or when it is not an empty string.

]]

local function is_set( var )
	return not (var == nil or var == '');
end


--[=[-------------------------< M A K E _ W I K I L I N K >----------------------------------------------------

Makes a wikilink; when both link and display text is provided, returns a wikilink in the form [[L|D]]; if only
link is provided, returns a wikilink in the form [[L]]; if neither are provided or link is omitted, returns an
empty string.

]=]

local function make_wikilink (link, display)
	if is_set (link) then
		if is_set (display) then
			return table.concat ({'[[', link, '|', display, ']]'});
		else
			return table.concat ({'[[', link, ']]'});
		end
	else
		return '';
	end
end


--[[--------------------------< L I N K _ M A K E >------------------------------------------------------------

makes a wikilink from the value assigned to 'link' in <taxon_t>

]]

local function link_make (taxon_t, taxon)
	local link;

	if taxon_t.link then
		local link_label;
		local link_target;
		if taxon_t.link:find ('Incertae sedis', 1, true) then
			link_label = '\'\'incertae sedis\'\'';
			link_target = 'Incertae sedis';
		elseif taxon_t.link:match ('([^|]+)|(.*)') then							-- is link a piped link?
			link_target, link_label = taxon_t.link:match ('([^|]+)|(.*)');
		else
			link_label = taxon:match ('([^/]+)/(.*)') or taxon;					-- variant of Module:Autotaxobox l.stripExtra(taxon)
		end

		link_target = (link_target and link_target) or link_label;				-- when no <link_target> make it same as <link_label>
		if is_italic_taxon_t[taxon_t.rank] then
			link_label = require('Module:TaxonItalics').italicizeTaxonName (link_label, false);
		end
		link = make_wikilink (link_target, link_label);

		if taxon_t.extinct and (not link:find ('†', 1, true)) then
			link = '<span style="font-style:normal;font-weight:normal;">†</span>' .. link;
		end
		if taxon:match ('/%?$') and not link:find ('?', 1, true) then
			link = link .. '<span style="font-style:normal;font-weight:normal;"> (?)</span>'
		end
	end

	return link;
end


--[[--------------------------< _ C R A W L _ T R E E >--------------------------------------------------------

experimental function to see if it is possible / makes sense to replace 87k+ taxonomy templates with lua data modules

for use in Module:Autotaxobox/sandbox call this function with make_tables() from taxonomyList()

fills tree_t: inverted sequence table of taxa and their ranks

]]

local function _crawl_tree (taxon, tree_t)
	local starting_taxon = taxon;												-- save a copy for error messaging
	local taxon_t = taxon_get (taxon);											-- initialize

	while taxon_t and taxon do
		if taxon_t.rank then													-- nil for Taxonomy/Life
			local styled_rank = anglicize_rank_t[taxon_t.rank];
			styled_rank = ((taxon_t.always_display or is_always_displayed_t[taxon_t.rank:lower()]) and '\'\'\'' .. styled_rank .. '\'\'\'') or styled_rank;
			local linked_taxon = link_make (taxon_t, taxon)
			local suffix = taxon:match ('%/[%w]+$') or ""                       -- get suffix (e.g. /skip, /plantae)
			if suffix ~= "" then
			    linked_taxon = linked_taxon .. "&nbsp;&nbsp;<small>" .. suffix .. "</small>";
			end
			table.insert (tree_t, 1, styled_rank .. ': ' .. linked_taxon );
			if taxon:find ('/skip', 1, true) then
				table.insert (tree_t, 1, string.rep ('&middot;', 5 ) .. ': ' .. string.rep ('&middot;', 5 ));
			end
			if taxon_t.parent then
				taxon = taxon_t.parent;											-- get the next taxon
				taxon_t = taxon_get (taxon);									-- and get its taxon table

				if nil == taxon_t then
					table.insert (tree_t, 1, '<span style="color:#d33">no path to \'Life\' at ' .. taxon .. ' from ' .. starting_taxon .. '</span>');
				end
			else
				table.insert (tree_t, 1, '<span style="color:#d33">no parent for taxon ' .. taxon .. ' from ' .. starting_taxon .. '</span>');
				node = nil;														-- no next taxon
			end
		else
			if not (('Life' == taxon) or ('Veterovata' == taxon) or ('Ichnos' == taxon)) then
				table.insert (tree_t, 1, '<span style="color:#d33">no rank or same_as for taxon ' .. taxon .. ' from ' .. starting_taxon .. '</span>');
			end

			taxon = nil;														-- no next taxon
		end
	end

	if last_loaded_module then
		package.loaded[last_loaded_module] = nil;								-- unload to conserve memory
	end
	package.loaded[base_data_table_name .. 'new'] = nil;
	return tree_t
end


--[[--------------------------< W I K I D A T A _ G E T >------------------------------------------------------



]]

local TAXON_NAME_P = 'P225'; --  mainsnak.datavalue["type"] = "string", mainsnak.datavalue.value = Felis, mainsnak["property"] = "P225", mainsnak["snaktype"] = "value",
local TAXON_RANK_P = 'P105'; --  mainsnak.datavalue.value["entity-type"] = "item", mainsnak.datavalue.value.id = qid, mainsnak["property"] = "P105", mainsnak["snaktype"] = "value",
local TAXON_PARENT_P = 'P171'; --  mainsnak.datavalue.value["entity-type"] = "item", mainsnak.datavalue.value.id = qid, mainsnak["property"] = "P171", mainsnak["snaktype"] = "value",


local function wikidata_get (qid, prop)
	local s_qid;
	local wd_table_t = mw.wikibase.getBestStatements (qid, prop)[1];			-- attempt to get the taxon name
	if not wd_table_t then
		error ('no data for ' .. qid .. ' ' .. prop);							-- some sort of better error handling needed
	end

	if wd_table_t.mainsnak.datavalue then
		if 'string' == type (wd_table_t.mainsnak.datavalue.value) then
			return wd_table_t.mainsnak.datavalue.value;							-- return a string value; here for taxon name
		end

		if 'table' == type (wd_table_t.mainsnak.datavalue.value) then
			s_qid = wd_table_t.mainsnak.datavalue.value.id;						-- extract the qid for taxon rank or parent taxon
			return mw.wikibase.getLabelByLang (s_qid, 'en'), s_qid;				-- return a string label and s_qid (used for parent); here for taxon rank and parent taxon
		end
	else
		return '<span style="color:#d33">no value</span>';
	end
end

--[[--------------------------< _ C R A W L _ W I K I D A T A _ T R E E >--------------------------------------

this is an experimental function to see if I can figure out how to walk a taxonomy tree in wikidata
Wikidata:Project_chat#is_this_possible%3F

Apparently not: Wikidata:Project_chat/Archive/2021/10#is_this_possible?

]]

local function _crawl_wikidata_tree (taxon_qid)
	local out_t = {};

	local taxon;
	local rank;
	local _;

	while taxon_qid do
		taxon = wikidata_get (taxon_qid, TAXON_NAME_P);
		rank = wikidata_get (taxon_qid, TAXON_RANK_P);
		_, taxon_qid = wikidata_get (taxon_qid, TAXON_PARENT_P);				-- parent taxon name discarded, reset taxon_qid to the parent taxon's qid

		taxon = (is_italic_taxon_t[rank] and '\'\'' .. taxon .. '\'\'') or taxon;	-- italicize when appropriate

		rank = anglicize_rank_t[rank] or rank:gsub ('(%a)', string.upper, 1);	-- anglicize accepted ranks; uppercase first letter for all others
		rank = (is_always_displayed_t[rank:lower()] and '\'\'\'' .. rank .. '\'\'\'') or rank;	-- and italicize those that should be

		table.insert (out_t, 1, rank .. ': ' .. taxon);							-- save at the top of the list
	end

	return table.concat (out_t, '<br />');										-- make a big string and done
end


--[[--------------------------< C R A W L _ W I K I D A T A _ T R E E >----------------------------------------

entry point from {{#invoke:Sandbox/trappist_the_monk/taxonomy|crawl_wikidata_tree|Q...}}

]]

local function crawl_wikidata_tree (frame)
	return _crawl_wikidata_tree (frame.args[1]);
end


--[[--------------------------< C R A W L _ T R E E >----------------------------------------------------------


]]

local function crawl_tree (frame)
	local tree_t = {};
	local loaded = {};
    local taxon = frame.args[1] or 'Felis';

	local wikidata_id = mw.wikibase.getEntityIdForTitle (taxon);				-- only works when no disambiguation

	tree_t = _crawl_tree (taxon, tree_t)										-- crawl the tree to get the debug taxon list of taxa and their ranks

	local count = 0;															-- DEBUG: tally of total modules loaded
	for module, v in pairs (modules_loaded) do									-- DEBUG: make a sortable list of module names for log
		count = count + v;
		table.insert (loaded, module);
	end

	local function comp (a, b)													-- DEBUG: sort module names for log
		local letter_a, enum_a = a:match ('(%a)(%d*)$');						-- get letter and enumerator from 'taxonomy <letter><enum>'
		local letter_b, enum_b = b:match ('(%a)(%d*)$');

		enum_a = tonumber (enum_a);												-- convert enumerators to number type if present; nil else
		enum_b = tonumber (enum_b);

		if (letter_a == letter_b) then											-- when letters the same compare enumerators
			if enum_a and enum_b then											-- both must be enumerated (we don't do 'taxonomy 'P' and 'taxonomy P1')
				return enum_a < enum_b;
			end
		end
		return letter_a < letter_b;												-- default compare letters
	end

	table.sort (loaded, comp);													-- DEBUG: sort module names for log
	for _, module in ipairs (loaded) do											-- DEBOG: log module names
		mw.log (module .. ': ' .. modules_loaded[module]);
	end
	
	mw.log ('total modules loaded: ' .. count);									-- DEBUG: add tally of loaded modules to log

	local out_t = {};															-- render crude tree from data modules, from wikidata, and taxonomy list from Module:Autotaxobox for comparison
	table.insert (out_t, '{| class="wikitable"\n! lua data module experiment !! wikidata experiment !! autotaobox reference\n|-\n|');
	table.insert (out_t, table.concat (tree_t, '<br />'));
	table.insert (out_t, '\n| ');
	table.insert (out_t, _crawl_wikidata_tree (wikidata_id));
	table.insert (out_t, '\n| ');
	table.insert (out_t, frame:callParserFunction ('#invoke', {'Autotaxobox/pagipadasan', 'taxonomyList', taxon}));
	table.insert (out_t, '\n|-\n|}');

	return table.concat (out_t);
end


--[[--------------------------< _ M A K E _ T A B L E S >------------------------------------------------------

experimental function to see if it is possible / makes sense to replace 87k+ taxonomy templates with lua data modules

for use in Module:Autotaxobox/sandbox

fills two tables:
	taxon_tree_t: equivalent to Module:Autotaxobox taxonTable{} – a sequence table where [1] is <starting node> but also has ['n']=number of taxa listed
	rank_tree_t: equivalent to Module:Autotaxobox taxonRankTable{} – a sequence table that matches the taxa in taxonTable{}; for 'Life', Veterovata, and Ichnos, empty string

]]

local function _make_tables (taxon, taxon_tree_t, rank_tree_t)
	local taxon_t = taxon_get (taxon);											-- initialize

	while taxon_t and taxon do
		if taxon_t.rank then													-- nil for Taxonomy/Life
			table.insert (taxon_tree_t, taxon);									-- add taxon name
			table.insert (rank_tree_t, taxon_t.rank);							-- add taxon rank
			if taxon_t.parent then
				taxon = taxon_t.parent;											-- get the next taxon
				taxon_t = taxon_get (taxon);									-- and get its taxon table
			end
		else
			if ('Life' == taxon) or ('Veterovata' == taxon) or ('Ichnos' == taxon) then
				table.insert (taxon_tree_t, taxon);								-- add last taxon name
				table.insert (rank_tree_t, '');									-- last taxon name has no rank so add empty string
			end

			taxon = nil;														-- no next taxon
		end
	end

	taxon_tree_t.n = #taxon_tree_t;												-- add the number of taxa in this table
	return taxon_tree_t, rank_tree_t
end


--[[--------------------------< M A K E _ T A B L E S >--------------------------------------------------------

interface function between Module:Autotaxobox taxonomyList() and _crawl_tree()

]]

local function make_tables (taxon)
	local taxon_t = {};
	local rank_t = {};
	local _;

	taxon_t, rank_t = _make_tables (taxon, taxon_t, rank_t);					-- crawl the tree to get the taxon list and the rank list; empty table not used here

	return taxon_t, rank_t;
end


--[[--------------------------< D A T A _ T A B L E _ W I K I L I N K _ M A K E >------------------------------

<suffix> is the lua data module suffix A1, A2, Q, etc; nil when creating template wikilinks
<taxon> is the taxon name associated with Template:Taxonomy/<taxon>
<caption> is boolean true when creating wikilink for wikitable caption

]]

local function data_table_wikilink_make (suffix, taxon, caption)
	local wikilink_t = {};

	table.insert (wikilink_t, ' <span style="font-weight: normal; float:right; margin-right:');		-- open styling span tag
	if caption then																-- if this wikilink is for the table caption
		table.insert (wikilink_t, '.5em">');
		if suffix then
			return '';															-- do not display wikilink/edit link at right of caption for data modules
		else																	-- here when caption and template so show template edit link only
			table.insert (wikilink_t, '&#x5B;<span class="plainlinks">');		-- open plainlinks span
			table.insert (wikilink_t, '[https://ilo.wikipedia.org/w/index.php?action=edit&title=Plantilia:taxonomy/');	-- begin edit link
			table.insert (wikilink_t, taxon);									-- add the taxon name
			table.insert (wikilink_t, '&preload=Plantilia:Taxonomy/preload edit]');	-- close the edit link
			table.insert (wikilink_t, '</span>&#x5D;</span>');					-- close the plainlinks span and the styling span
			return table.concat (wikilink_t);									-- make a big string and done
		end
	else
		table.insert (wikilink_t, '.04em">')
	end

	table.insert (wikilink_t, '&#x5B;[[');										-- enclosing brackets; open and open wikilink
	if suffix then																-- if creating module wikilink
		table.insert (wikilink_t, base_data_table_name);						-- add base data table name of wikilink target name
		table.insert (wikilink_t, suffix);										-- add <suffix> as last part of the wikilink target name
		table.insert (wikilink_t, '|taxonomy ');								-- first part of the wikilink label
		table.insert (wikilink_t, suffix);										-- add <suffix> as last part of the wikilink label
	else																		-- here when creating template wikilink
		table.insert (wikilink_t, 'Plantilia:Taxonomy/');
		table.insert (wikilink_t, taxon);
		table.insert (wikilink_t, '|Taxonomy');									-- the wikilink label for template
	end
	table.insert (wikilink_t, ']]');											-- close wikilink

	if not suffix then															-- don't add 'edit' link for data modules
		table.insert (wikilink_t, '; <span class="plainlinks">');						-- open plainlinks span
		table.insert (wikilink_t, '[https://ilo.wikipedia.org/w/index.php?action=edit&title=Plantilia:taxonomy/');	-- begin edit link
		table.insert (wikilink_t, taxon);											-- add the taxon name
		table.insert (wikilink_t, '&preload=Plantilia:Taxonomy/preload edit]');		-- close the edit link
		table.insert (wikilink_t, '</span>');										-- close the plainlinks span
	end
	table.insert (wikilink_t, '&#x5D;');										-- close enclosing brackets
--	table.insert (wikilink_t, ']]&#x5D;');										-- close wikilink; close enclosing brackets
	if caption then																-- if this wikilink is for the table caption
		-- table.insert (wikilink_t, '</span>');									-- close styling span tag
	end
	table.insert (wikilink_t, '</span>');
	return table.concat (wikilink_t);											-- make a big string and done
end


--[[--------------------------< _ T E M P L A T E _ S K E L E T O N >------------------------------------------

creates a Template:Taxonomy/<taxon> skeleton for <taxon> prefilled with data from the appropriate module (when
data are available); creates blank skeleton else.

]]

local function _template_skeleton (frame, taxon)
	if ({['life'] = true, ['veterovata'] = true, ['ichnos'] = true})[taxon:lower()] then	-- these are the taxonomy end taxons
		return '<span style="color:#d33">error: taxon: ' .. taxon .. '</span>';		-- error return for these; TODO: is this necessary?
	end

	local taxon_t = {};
	local out_t = {}

	local taxon_module_name = base_data_table_name .. 'new';					-- first look in the '~/Taxonomy new' data module
	_taxon_get (taxon, true, taxon_module_name, taxon_t);						-- attempts to fill <taxon_t> from '~/Taxonomy new' data module

	if not next (taxon_t) then													-- if <taxon_t> empty then taxon not in 'new'
		local suffix = module_select (taxon);									-- get the suffix to append to the base data module name
		taxon_module_name = base_data_table_name .. suffix;						-- not in '~/Taxonomy new' data module
		_taxon_get (taxon, true, taxon_module_name, taxon_t);					-- attempts to fill <taxon_t> from '~/Taxonomy <suffix>' data module
	end
	
	table.insert (out_t, "{{Don't edit this line {{{machine code|}}}");			-- first the embedded template
	for _, param in ipairs ({'same_as', 'parent', 'rank', 'link', 'extinct', 'always_display', 'refs'}) do
		if taxon_t[param] then
			table.insert (out_t, table.concat ({'|', param, '=', (true == taxon_t[param] and 'true') or taxon_t[param]}));
		else
			table.insert (out_t, table.concat ({'|', param, '='}));
		end
	end
	table.insert (out_t, '}}');
	
	return table.concat ({'<pre style="border:none; background:inherit; margin-top:-0.6em; margin-left:-1em">', table.concat (out_t, '\n'), '</pre>'});

--	return frame:callParserFunction ({name='#tag:syntaxhighlight', args={table.concat (out_t, '\n'), lang='moin'}});
end
	

--[[--------------------------< T E M P L A T E _ S K E L E T O N >--------------------------------------------

creates a Template:Taxonomy/<taxon> skeleton for <taxon> prefilled with data from the appropriate module (when
data are available); creates blank skeleton else.

]]

local function template_skeleton (frame)
	return  _template_skeleton (frame, frame.args[1]);
end

	
--[[--------------------------< S H O W _ T A X O N _ D A T A >------------------------------------------------

similar to the table produced by Template:Taxonomy key

]]

local function show_taxon_data (frame)
	local this_page = mw.title.getCurrentTitle().prefixedText;

	local code_open_tag = '<code style="border:none; background:inherit">';
	
	local taxon = frame.args[1];
	local out_t = {};
	local taxon_t, suffix = taxon_get (taxon, true);							-- get taxon data; do not follow same_as

	table.insert (out_t, '{| class="wikitable"');								-- open wikitable
	table.insert (out_t, '\n|+ ');												-- table caption wikimarkup
	table.insert (out_t, '<span style="float:left; margin-left:.5em>');
	table.insert (out_t, 'Taxonomy/');
	table.insert (out_t, taxon);												-- the taxon's name
	table.insert (out_t, '</span>');
	--table.insert (out_t, ' <span style="font-weight: normal">');				-- open span tag
	table.insert (out_t, data_table_wikilink_make (suffix, taxon, true));		-- add bracketed wikilink to lua data table for this <suffix> to wikitable caption

	local same_as = taxon_t.same_as;
	local ssuffix;

	if same_as then
		taxon_t, ssuffix = taxon_get (same_as, true);							-- get same_as taxon's data; do not follow same_as
	end

	local parent_t, psuffix = taxon_get (taxon_t.parent, true);					-- get parent taxon's data; do not follow same_as

	table.insert (out_t, '\n|-\n|Parent:\n|');
	if 'Life' == taxon or 'Veterovata' == taxon or 'Ichnos' == taxon then
		table.insert (out_t, 'none');
	else
		table.insert (out_t, code_open_tag);									-- open code tag
		table.insert (out_t, taxon_t.parent);									-- add parent taxon name
		table.insert (out_t, '</code> ');										-- close code tag; include space before lua data table wikilink
		table.insert (out_t, data_table_wikilink_make (psuffix, taxon_t.parent));	-- add bracketed wikilink to lua data table for this <suffix>
	end

	table.insert (out_t, '\n|-\n|Rank:\n|');
	local rank;
	if taxon_t.rank then
		rank = anglicize_rank_t[taxon_t.rank];
		local rank_t = {};
		table.insert (rank_t, code_open_tag);									-- open code tag
		table.insert (rank_t, taxon_t.rank);									-- insert raw rank from taxon data
		table.insert (rank_t, '</code> [displays as: ');						-- start the message
		local always_display = taxon_t.always_display or is_always_displayed_t[taxon_t.rank];
		if is_italic_taxon_t[taxon_t.rank] then									-- for italicized taxon ranks
			table.insert (rank_t, (always_display and '\'\'\'\'\'') or '\'\'');	-- open italic markup; bold if always displayed
			table.insert (rank_t, rank);										-- add anglicized rank
			table.insert (rank_t,  (always_display and '\'\'\'\'\'') or '\'\'');-- close italic/bold markup
		else
			table.insert (rank_t, (always_display and '\'\'\'') or '');			-- bold if always displayed
			table.insert (rank_t, rank);										-- add anglicized rank
			table.insert (rank_t, (always_display and '\'\'\'') or '');			-- close italic/bold markup
		end
		table.insert (rank_t, ']');												-- finish the message
		rank = table.concat (rank_t);											-- and make a big string

	elseif 'Life' == taxon or 'Veterovata' == taxon or 'Ichnos' == taxon then
		rank = 'none';
	else
		rank = '<span style="color:#d33">– a rank must be supplied</span>';
	end
	table.insert (out_t, rank);

	local link = link_make (taxon_t, taxon);

	if link then
		link = table.concat ({code_open_tag, mw.text.nowiki (taxon_t.link), '</code> [displays as: ', link, ']'});
	end

	table.insert (out_t, '\n|-\n|Link:\n|');
	table.insert (out_t, (link and link) or '–');

	local extinct = (taxon_t.extinct and (code_open_tag .. 'true</code>')) or 'no';
	if not taxon.extinct and parent_t.extinct then
		extinct = '<span style="background-color:#FCC">parent is marked as extinct</span>';
	end

	table.insert (out_t, '\n|-\n|Extinct:\n|');
	table.insert (out_t, extinct);

	table.insert (out_t, '\n|-\n|Always displayed:\n|');
	table.insert (out_t, (taxon_t.always_display and (code_open_tag .. 'true</code>')) or ((is_always_displayed_t[taxon_t.rank] and 'yes (major rank)') or 'no'))

	table.insert (out_t, '\n|-\n|Taxonomic references:\n|');
	table.insert (out_t, taxon_t.refs or '–');

	table.insert (out_t, '\n|-\n|Parent\'s taxonomic references:\n|');
	table.insert (out_t, parent_t.refs or '–');

	if same_as then
		table.insert (out_t, '\n|-\n|Same as taxon:\n|');
		table.insert (out_t, code_open_tag);									-- open code tag
		table.insert (out_t, same_as);												-- add same_as taxon name
		table.insert (out_t, '</code> ');											-- close code tag; include space before lua data table wikilink
		table.insert (out_t, data_table_wikilink_make (ssuffix, same_as));		-- add bracketed wikilink to lua data table for this <suffix>
	end

	if taxon:find ('/skip$') then
		local skipped_taxon = taxon:match ('([^/]+)/skip$');
		table.insert (out_t, '\n|-\n| colspan="2" | For the suffix "/skip", see [[:en:Wikipedia:Automated_taxobox_system/advanced_taxonomy#Skip_taxonomy_templates|Skip taxonomy templates]].<br />');
		table.insert (out_t, 'For the skipped taxa, see [[');					-- start the message and open wikilink markup
		table.insert (out_t, skipped_taxon);									-- add skipped taxon name without '/skip' suffix
		table.insert (out_t, ']]');												-- close wikimarkup
--		table.insert (out_t, 'For the skipped taxa, see <code>');				-- start the message and open code tag
--		table.insert (out_t, skipped_taxon);									-- add skipped taxon name without '/skip' suffix
--		table.insert (out_t, '</code> ');										-- close code tag; include space before lua data table wikilink
--		table.insert (out_t, data_table_wikilink_make (suffix, skipped_taxon));	-- add bracketed wikilink to lua data table for this <suffix> or to taxonomy template
	end

	if taxon:find ('/%?$') then
		table.insert (out_t, '\n|-\n| colspan="2" | For the suffix "/?", see [[:en:Wikipedia:Automated_taxobox_system/advanced_taxonomy#Questionable_assignments|Questionable assignments]].');
	end

	if taxon:find ('Incertae sedis') then
		table.insert (out_t, '\n|-\n| colspan="2" |');
		table.insert (out_t, 'For taxon names with "Incertae sedis", see [[:en:Wikipedia:Automated_taxobox_system/advanced_taxonomy#Incertae_sedis_taxonomy_templates|\'\'Incertae sedis\'\' taxonomy templates]].');
	end

	if suffix then
		table.insert (out_t, '\n|- style="vertical-align: top;"\n|Template skeleton:<br />data loaded from ');
		table.insert (out_t, '&#x5B;[[');										-- enclosing brackets; open and open wikilink
		table.insert (out_t, base_data_table_name);								-- add base data table name of wikilink target name
		table.insert (out_t, suffix);											-- add <suffix> as last part of the wikilink target name
		table.insert (out_t, '|taxonomy ');										-- first part of the wikilink label
		table.insert (out_t, suffix);
		table.insert (out_t, ']]&#x5D;');										-- close enclosing brackets; close wikilink
		
		table.insert (out_t, '<br />to change these data:\n#copy the template skeleton\n#click &#x5B;');
		table.insert (out_t, '<span class="plainlinks">[https://ilo.wikipedia.org/w/index.php?action=edit&title=Plantilia:taxonomy/');	-- begin edit link
		table.insert (out_t, taxon);											-- add the taxon name
		table.insert (out_t, '&preload=Plantilia:Taxonomy/preload create]</span>&#x5D;\n#paste, and edit');		-- close the edit link
		table.insert (out_t, '\n|');
		table.insert (out_t, _template_skeleton (frame, taxon));
	end

	table.insert (out_t, '\n|}');												-- close the wikitable
	return frame:preprocess (table.concat (out_t));
end


--[[--------------------------< D E L E T E _ T A X O N >------------------------------------------------------

deletes a taxon entry from a taxonomy data module.

Calling this function finds the correct data module, reads it and removes the specified taxon entry.  The output
a copy of the data module that can be copy/pasted into the data module.  Yeah, I know, crude but lua can't write
wikitext.

TODO: error checking?  What if the taxon isn't found?

]]

local function delete_taxon (frame)
	local taxon = frame.args[1];
	local taxonomy_t = {};
	local suffix = module_select (taxon);

	local content = mw.title.new (base_data_table_name .. suffix):getContent()
	local found = false;

	local out_t = {};

	for entry in content:gmatch ('\t*%[\'[^\r\n]+},[\r\n]+') do
		local entry_taxon = entry:match ('^\t*%[\'([^=]+)\'%]%s*=');
		if entry_taxon == taxon then
			found = true;
		else
			table.insert (out_t, entry);
		end
	end

	if not found then
		return '<span style="color:#d33">Taxon: ' .. taxon .. ' not found in [[Modulo:Biota infobox/taxonomy ' .. suffix .. ']]';
	end
	table.sort (out_t)

	table.insert (out_t, 1, 'return {\n')
	table.insert (out_t, '\t}')

	return 'deleted: ' .. taxon .. '\n\n' .. frame:callParserFunction ({name='#tag:syntaxhighlight', args={table.concat (out_t), lang='lua'}});

end



--[[--------------------------< Q I D S _ G E T >--------------------------------------------------------------

{{#invoke:Sandbox/trappist_the_monk/taxonomy|qids_get|<select>}}

where <select> can be
	no qids – returns a list of links that do not have qids and associated taxon name
	no links – returns a list of taxons that do not have links
	<anything else> - returns a list of links, the associated qid, and associated taxon name

]]

local function qids_get (frame)
	local select = frame.args[1];
	local module_name = 'Modulo:Biota_infobox/taxonomy_' .. frame.args[2];
	if not pcall (require, module_name) then									-- attempt to load; data will be fetched from package.loaded[module_name]
		return '<span style="color:#d33">failed to load: Modulo:Biota_infobox/taxonomy_' .. frame.args[2] .. '</span>';		-- failed to load
	end

	local qids = {}																-- sequence table of links and their qids
	local no_qids = {};															-- sequence table of links that do not have a qid
	local no_links = {};														-- sequence table of taxons that do not have links
	
	for taxon, taxon_t in pairs (package.loaded[module_name]) do
		local link = taxon_t.link;												-- because taxon_t.link (from ms.loadData()) is read only
		if link then
			link = link:gsub ('(.+)|.*', '%1');									-- remove any link label
			local qid = mw.wikibase.getEntityIdForTitle (link, 'enwiki');		-- qid referred to by link in module data
			if qid then
				table.insert (qids, '*[[' .. link .. ']]' .. ': ' .. qid .. ' from ' .. taxon);
			else
				table.insert (no_qids, '*[[' .. link .. ']]' .. ' from ' .. taxon);
			end
		else
			table.insert (no_links, taxon);
		end
	end

	package.loaded[module_name]=nil;
	
	if 'no qids' == select then
		table.sort (no_qids);
		return table.concat (no_qids, '\n');
	elseif 'no links' == select then
		table.sort (no_links);
		return table.concat (no_links, '\n');
	else
		table.sort (qids);
		return table.concat (qids, '\n');
	end
end


--[[--------------------------< E X P O R T E D   F U N C T I O N S >------------------------------------------


]]

return {
	crawl_tree = crawl_tree,
	_crawl_tree = _crawl_tree,
	crawl_wikidata_tree = crawl_wikidata_tree,

	make_tables = make_tables,													-- interface function between Module:Autotaxobox taxonomyList() and _crawl_tree()

	show_taxon_data = show_taxon_data,											-- similar to the table produced by Template:Taxonomy key
	
	taxon_get = taxon_get,

--	taxomap_t = taxomap_t,
	delete_taxon = delete_taxon,
	template_skeleton = template_skeleton,
	
	qids_get = qids_get,
	}