User:DePiep/chembox/wikidata

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(mostly 2016-17?)

Chemical compounds and Wikidata

Example: en:Carbon monoxide == d:Q2025

In Wikidata

Wiki poject site prefix: en: for enwiki <=> d: for Wikidata

Page content: "article" <=> "item"

Identifiers: en:Article <=> d:QID

Title: en:Pagename <=> d:en-label for QID

Property id: en: |CASNo= (infobox parameter) <=> d: P231 (property id for CAS number)

Property value: en: |CASNo=630-08-0 <=> {{#Property:P231|from=Q2025}} → 630-08-0

Chembox, Drugbox

d: single chemical

d:Wikidata:Glossary

local = in en:wiki, e.g. by parameter |CASNo= wd, d: in wikidata

Chemical compound data models

In Wikidata

d:Chemical substance

can be

d:Chemical compound or

Ion or

Chemical element or

Mixture or

...

See also: d:Wikidata:WikiProject Chemistry

With Chembox

Article (title) can be

Single chemical compound

Multiple chemical compounds

Group (class) of chemical compounds -- Copaene

With Drugbox

Article (title) can be

Single chemical compound (most common)

Two chemical compounds

Vaccine (not a compound)

MAB (not a compound)

Combination of drugs (not a compound)

Wikidata item in Chembox

Link to the Wikidata item

The link in {{Chembox}} to the Wikidata page (item page)

demo here

Article has its corresponding item in Wikidata connected (QID)

All properties available

Articles that are not present in Wikidata (do not have an item in WD): ‹The template Category link is being considered for merging.› Category:not in WD

Local input, read another d:item that the natural one: |QID=Q999 → read d:item Q999

‹The template Category link is being considered for merging.› Category:QID local

Provides the Wikidata link d:QID to view, edit.

Overview (item and QID)

• Parameters involved:

(default) 'natural item', d:page (has QID)

|QID= locally set tioo us alternate item

Article has natural item (d:QID)
	Yes	No
status code	wdYes	wdNo
track cat	‹The template Category link is being considered for merging.› Category:Chemical compound in Wikidata trivial	(be 0) ‹The template Category link is being considered for merging.› Category:Chemical compound not in Wikidata
example	carbon monoxide	(todo)
d:link	Q2025	d:Special:Search/Foobar (?)
to edit	Y	create d:Item | move article | not a compound?

Infobox has item set by |QID=
	Yes overwrites natural item	No
status code	qidYes	qidNo
track cat	‹The template Category link is being considered for merging.› Category:Chemical compound by local QID for Wikidata	(no cat)
example	in Foobar |QID=Q9999	carbon monoxide (trivial)
d:link	Q9999	(by natural item)
to edit	create d:Item | article not a compound?

Note: these two settings are independent. One setting does not determine or influence the other one. However, we can combine them and apply logic.

• "Not a compound" situation will require attention. Issue in the data models (infobox, Wikidata)?
• Multiple compound situation: use indexes.
• Checks to do:

qidYes: (localQID needed) not a compound? other data issue?

qidYes: local QID is a compound?

qidYes: localQID = natural QID: remove (blank) localQID

Item property in Wikidata

Use ECHA InfoCard ID from Wikidata

Straightforward: when the article item has a value for Property P2566 ECHA Infocard ID, it is shown.

‹The template Category link is being considered for merging.› Category:ECHA from WD

Use CAS number input from Wikidata

Template {{Chembox}} reads item-property P231 (CAS number): {{#property:P231}}

{{Chembox}} can have QID set. In that case, that item's CAS number will be read:

QID=Q976 → CAS nr = ...

Overview (CAS)

Item has CAS number (P231) Item is by localQID when set, or natural
		Yes	No
local |CAS= input	Yes	situation: YesYes SAME cat: CAS number from Wikidata edit: Y rm localCAS (trivial edit)	situation: NoYes cat (be 0): CAS number local not in Wikidata edit:   update d:item | rm localCAS | confirm CAS=none
		situation: YesYes DIFF cat (be 0): CAS number different in Wikidata edit: * solve conflict, rm localCAS or change d:CAS
	No	situation: YesNo cat: CAS number from Wikidata edit: Y	situation: NoNo cat (be 0) (cannot categorize, use PETSCAN): CAS number not in Wikidata edit:   not a compound? | search CAS, add to d:Item

Add |wdIssue=nac/not a compound?

Multiple compounds in one article (indexes)

One article can have multiple compounds.

In the infobox, these can be listed by using indexes. The first compound can be the article item (or the |QID= when set).

The other compounds require their own item (QID) being set. So for this one should use |QID1= ... |QID5=

|CASNo=

|PubChem=

|QID1=

|CASNo1=

|PubChem1=

|QID2=

|CASNo2=

|PubChem2=

|QID5=

|CASNo5=

|PubChem5=

Note that each index is about one single compound. So stuff1 has CASnr1 and PubChem1.

The <blank> values uses the article item value.

With that, CASNo1 and PubChem1 are read from |QID1=

Overview (indexed CAS)

Copaene

(indexed does not categorize: CAS number from Wikidata)

wdCAS yes-->Category:CAS number (indexed) different in Wikidata
wdCAS no -->Category:CAS number (indexed) not in Wikidata