Property talk:P19

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official website
URL of the official homepage of an item (current or former) [if the homepage changes, add an additional statement with preferred rank. Do not remove the former URL]

Represents	official website (Q2181)
Has quality	official (Q2182)
Data type	URL
Corresponding template	Template:Official website (Q709)
Allowed values	(https?|ftps?)://\S+(?i)((?!\b(:\/\/web\.archive\.org\/)).)*
Example	Facebook (Q101) → https://www.facebook.com Prime 9ja Online Media (Q415) → https://www.prime9ja.com.ng
See also	stated in (P75), imported from Miraheze project (P193), website account on (P390), described at URL (P36), exact match (P34), terms of service URL (P194), privacy policy URL (P196)
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 Gratispaideia Items with the fewest sitelinks Most linked wikis Items with the most identifier properties 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)> Map Random list
Proposal discussion	Originally created without a formal discussion
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Format “(https?|ftps?)://\S+”: value must be formatted using this pattern (PCRE syntax). Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P19#Format, SPARQL

Qualifiers “language of work or name (P35), start time (P174), end time (P175), retrieved (P200), archive URL (P191), archive date (P205), applies to part (P178), copyright license (P326), part of (P47), publisher (P125), subject has role (P202), subject named as (P82), point in time (P80), has quality (P48), reason for deprecated rank (P344), title (P106), reason for preferred rank (P345), privacy policy URL (P196), terms of service URL (P194), latest date (P172), of (P45), nature of statement (P497)”: this property should be used only with the listed qualifiers. Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P19#Allowed qualifiers, SPARQL

Conflicts with “instance of (P3): Gratispaideia disambiguation page (Q510), Gratispaideia category (Q485), Gratispaideia template (Q500), Gratispaideia list article (Q2683)”: this property must not be used with the listed properties and values. Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P19#Conflicts with, SPARQL

Scope is as main value (Q793): the property must be used by specified way only Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P19#scope, SPARQL

Single best value: this property generally contains a single value. If there are several, one would have preferred rank Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P19#single best value, SPARQL

Item “instance of (P3)”: Items with this property should also have “instance of (P3)”. Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P19#Item, SPARQL

Format “(?i)((?!\b(:\/\/web\.archive\.org\/)).)*”: value must be formatted using this pattern (PCRE syntax). Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P19#Format, SPARQL

Required qualifier “language of work or name (P35)”: this property should be used with the listed qualifier. Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P19#mandatory qualifier, SPARQL

Allowed entity types are Wikibase item datatype (Q799): the property may only be used on a certain entity type Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P19#allowed entity types