Property talk:P508

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BNCF Thesaurus ID
identifier in the subject indexing tool of the National Central Library of Florence

Associated item	National Central Library of Florence (Q460907), National Central Library of Florence (Q460907)
Applicable "stated in" value	Nuovo soggettario (Q16583225)
Data type	External identifier
Allowed values	\d{1,5}
Example	artificial intelligence (Q11660) → 7253 (RDF) wood (Q287) → 3389 (RDF)
Source	https://thes.bncf.firenze.sbn.it/ricerca.php
Formatter URL	https://thes.bncf.firenze.sbn.it/termine.php?id=$1
Tracking: usage	Category:Pages using Wikidata property P508 (Q32317092)
Related to country	Italy (Q38) (See 402 others)
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/P508 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 17,356 Main statement 17,025 98.1% of uses Qualifier 2 <0.1% of uses Reference 329 1.9% of uses
Search for values

[create Create a translatable help page (preferably in English) for this property to be included here]

Format “\d{1,5}”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P508#Format, hourly updated report, SPARQL

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

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). Known exceptions: appetizer (Q1628963), antipasto (Q622440)
List of violations of this constraint: Database reports/Constraint violations/P508#Unique value, SPARQL (every item), SPARQL (by value)

Single value: this property generally contains a single value. (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/P508#Single value, 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/P508#Entity types

Scope is as main value (Q54828448), as reference (Q54828450): the property must be used by specified way only (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/P508#Scope, SPARQL

Conflicts with “instance of (P31): Wikimedia disambiguation page (Q4167410), Wikimedia category (Q4167836), Wikimedia list article (Q13406463), human (Q5)”: this property must not be used with the listed properties and values. (Help)

List of violations of this constraint: Database reports/Constraint violations/P508#Conflicts with P31, hourly updated report, SPARQL

Qualifiers “subject named as (P1810), alternative name (P4970), scope note (P9570), mapping relation type (P4390)”: this property should be used only with the listed qualifiers. (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/P508#allowed qualifiers, SPARQL

Label required in languages: it: Entities using this property should have labels in one of the following languages: it (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/P508#Label in 'it' language, search, SPARQL

This property is being used by: it:Template:Thesaurus BNCF cy:Nodyn:Cyffuriau be-tarask:Шаблён:Комплексная навука Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

constraint report relating to Wikimedia disambiguation page (Q4167410)

If instance of (P31) is a Wikimedia disambiguation page (Q4167410) the presence of BNCF Thesaurus ID (P508) is prohibited. לערי ריינהארט (talk) 18:00, 13 May 2014 (UTC)

see: Wikimedia disambiguation page (Q4167410) with BNCF Thesaurus (P508) לערי ריינהארט (talk) 18:37, 13 May 2014 (UTC)

Usualy there might be more possibilities:

a) Please identify the non - ambiguation page (WD item) where the property BNCF Thesaurus should be moved;
"normally" no other statements should be left at the disambiguation page.
It can happen that a set of properties should be moved to another (a second) WD item, another set to a third WD item etc.

b) (recomended method:) Verify which language is a disambiguation page and separate it from the rest. Please use Gadget-labelLister.js ^{can be activated at preferences#gadgets} to remove all faulty (disambiguation) descriptions after the disambiguation page is separated: Verify the descriptions for the following languages: de, en, fr, es, pt, pt-br, ru, sv which where added by bots long time ago and take a short look at the other language descriptions.

c) If method b) can not be used because all linked WMF-project language pages are (local) disambiguation pages please create a new WD item and add a proper description in your native language and in English.

Thanks in advance!

Today (more then two months after the first report) 949 items are found. gangLeri לערי ריינהארט (talk) 06:52, 17 July 2014 (UTC)

Problems with visualisation

When I first encountered this property on an item, it was linked to the relevant page on the BNCF site, but now this link disappeared, what happened? Bever (talk) 17:54, 13 September 2014 (UTC)

Setting unique and single values as mandatory

Yesterday I held a technical meeting with National Central Library of Florence (Q460907)'s staff, to analyse and further improve the synchronisation of their thesaurus with Wikidata. One of the ideas we had is to set as mandatory unique and single values, as there shouldn't be exceptions to the 1:1 rule (or at least, really few exceptions). I'm just noting this down for the future. They also gave me a substantial list of confirmed matches, that will be uploaded in the next days. Sannita - not just another it.wiki sysop 10:00, 1 March 2017 (UTC)

add |mandatory=true only if the violation count is at 0, per Wikidata:Database reports/Constraint violations/Mandatory constraints. Note that setting this parameter does not change how users obey the constraint. It only adds the violations to an overview page to spot data structure degradation more easily. --Pasleim (talk) 14:18, 2 March 2017 (UTC)

@Pasleim: Hm, ok. After we clean all the existing violations, do you advice to put "mandatory = true" back again or not? I do know that it doesn't affect the users' behaviour, but still it's important to fix this. --Sannita - not just another it.wiki sysop 19:48, 2 March 2017 (UTC)