Property talk:P6852

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CCDC Number
unique numerical identifier for crystal structures submitted to the Cambridge Crystallographic Data Centre (CCDC)

Data type	External identifier
Domain	type of chemical entity (Q113145171)
Allowed values	^\d{6,7}
Example	ammonium oxalate (Q419626) → 1213725 2-iodobenzoic acid (Q2535469) → 179601 ferric acetylacetonate (Q7843940) → 161834
Source	https://www.ccdc.cam.ac.uk/ https://www.ccdc.cam.ac.uk/structures/?
Formatter URL	https://identifiers.org/ccdc:$1 https://www.ccdc.cam.ac.uk/services/structures?sid=IDORG&pid=csd:$1 https://www.ccdc.cam.ac.uk/structures/Search?Ccdcid=$1
See also	CAS Registry Number (P231)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other external identifier Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Database reports/Constraint violations/P6852 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 333 Main statement 330 out of 1,000,000 (0% complete) 99.1% of uses Qualifier 3 0.9% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Type “type of chemical entity (Q113145171)”: item must contain property “instance of (P31)” with classes “type of chemical entity (Q113145171)” or their subclasses (defined using subclass of (P279)). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P6852#Type Q113145171, SPARQL

Format “^\d{6,7}”: value must be formatted using this pattern (PCRE syntax). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P6852#Format, SPARQL

Distinct values: this property likely contains a value that is different from all other items. (Help)

List of violations of this constraint: Database reports/Constraint violations/P6852#Unique value, hourly updated report, SPARQL (every item), SPARQL (by value)

Scope is as main value (Q54828448), as reference (Q54828450): the property must be used by specified way only (Help)

List of violations of this constraint: Database reports/Constraint violations/P6852#Scope, hourly updated report, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P6852#Entity types

Resolving overlap with the CSD Refcode

See https://www.wikidata.org/wiki/Wikidata_talk:WikiProject_Chemistry#CCDC_Number_and_CSD_Refcode --Egon Willighagen (talk) 09:14, 30 November 2022 (UTC)

The property proposal for CSD Refcode is here: https://www.wikidata.org/wiki/Wikidata:Property_proposal/CSD_Refcode --Egon Willighagen (talk) 11:20, 30 November 2022 (UTC)

Feedback from CCSD on the details of the CCDC Number:

• update the description to "Unique numerical identifier for crystal structures submitted to the CCDC"
• update the regex to ^\d{6,7}
• the examples are for CSD Refcode, so we need correct examples
• formatter URL should be: https://identifiers.org/ccdc:$1

Egon Willighagen (talk) 11:23, 30 November 2022 (UTC)

Saehrimnir
Leyo
Snipre
Dcirovic
Walkerma
Egon Willighagen
Denise Slenter
Daniel Mietchen
Kopiersperre
Emily Temple-Wood
Pablo Busatto (Almondega)
Antony Williams (EPA)
TomT0m
Wostr
Devon Fyson
User:DePiep
User:DavRosen
Benjaminabel
99of9
Kubaello
Fractaler
Sebotic
Netha
Hugo
Samuel Clark
Tris T7
Leiem
Christianhauck
SCIdude
Binter
Photocyte
Robert Giessmann
Cord Wiljes
Adriano Rutz
Jonathan Bisson
GrndStt
Ameisenigel
Charles Tapley Hoyt
ChemHobby
Peter Murray-Rust
Erfurth
TiagoLubiana

Notified participants of WikiProject Chemistry, with permission, I will make these updates. --Egon Willighagen (talk) 11:23, 30 November 2022 (UTC)

 Support — Can only support. @Egon Willighagen Thank you for your continuous effort in curating chemistry data! AdrianoRutz (talk) 11:32, 30 November 2022 (UTC)

Correct examples: ammonium oxalate (Q419626) → 1213725 (was MOYHAJ), 2-iodobenzoic acid (Q2535469) → 179601 (was OIBZAC01), and ferric acetylacetonate (Q7843940) → 161834 (was FEACAC03). --Egon Willighagen (talk) 11:28, 30 November 2022 (UTC)

I agree with Egon's assessment Cthoyt (talk) 12:34, 30 November 2022 (UTC)

 Support. --Leiem (talk) 13:08, 30 November 2022 (UTC)

CSD Refcode (P11375) has been accepted and I applied the above chances in the documentation of this property. --Egon Willighagen (talk) 10:13, 29 December 2022 (UTC)