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ویکی ڈیٹا:فرہنگ

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This page is a translated version of the page Wikidata:Glossary and the translation is 5% complete.

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Elements of a statement

Wikidata is a knowledge base that anyone can edit. This page is a reference for users and will try to establish consistency in terminology, which will hopefully help to improve discussion and communication among editors.


Aliases (called also known as in the user-interface) are language-specific alternate names for items, properties and queries that can be used for lookup the same way as labels (titles). Similar to the labels they are language specific, but unlike the labels there can be as many aliases as necessary. See Help:Aliases.


A badge is a kind of marker attached to a sitelink, which could identify, for example, that the article is a "featured article" on a specific site. This will be a feature in the future.


Claim is the part of a statement without the references.

Constraint is a rule how a particular property should be used. For instance most identifiers should have only one value, so there is a single value constraint on them.

Datatypes (data value type or value type) are what kind of data values that may be assigned to a property, and how the data values are stored in each claim. See Special:ListDatatypes for currently available datatypes. Each property is assigned a pre-defined datatype.

Help:Data type

Description is a language-specific descriptive phrase for an item, property or query. It provides context for the label (for example, there are many items about places with the label "Cambridge"). The description therefore does not need to be unique, neither within a language or the overall project, but it must be unique together with the label. Uniqueness for a combination of a label and a description is a hard constraint that must be satisfied before a change can be saved. See Help:Description for more information, including proper styling of descriptions.


Entity (also known as data set) is a Wikidata page, that either may be an item (in the main namespace), a property (in the property namespace) or a query (in the query name space). Every entity is uniquely identified by an entity ID, which is a prefixed number, for example starting with the Q prefix for an item, and P for a property and U for query. An entity is also identified by a unique combination of label and description in each language. The entity can also be assigned a set of alternative multilingual aliases. (In ontologies and library catalogues that are used as reference for Wikidata, an entity is typically a real-life topic or subject, or its database representation, and corresponds in that context to what in Wikidata is called an item.)

External identifier Some properties have values that are strings used in the databases of external organisations. They uniquely identify an item. For example, an ISBN for a book or the unique part of the URL of a movie or an actor in the Internet Movie Database.

Item is a page in Wikidata main namespace that represents a real-life topic, concept, or subject. Just like other Wikidata entities, items are identified by an entity ID (an item ID is a number prefixed with a Q, e.g. Q1), and by a unique combination of multilingual label and description, and may also be assigned an alias. Items consist of sitelinks to linked pages. They may also consist of statements, including property-value pairs, and sources. According to Wikidata notability policy, only items that have at least one sitelink to Wikipedia article are currently allowed.


Label (also known as name) is a language-specific name used for items, properties and queries. This is usually the most important name the entry is known under, or the most general or easily understandable phrase it will be known as internally to the project. Within Wikidata this takes the role of the title in Wikipedia and is used as the primary means to distinguish entries. For items it does not need to be unique, neither in the language or the overall project, but it must be unique together with the description. For properties and queries (not defined yet) it must be unique within the given language. Uniqueness for a combination of a label and a description is a hard constraint that must be satisfied before a change can be saved, although it may be removed in the future.
Labels should use the language specific conventions for capitalization of proper names and phrases as seems fit for the specific entry. In listings the label will be followed by the description so they join as a single list entry. Both labels and descriptions can be extracted and used independently. See Help:Label.


Language attributes are the language-specific labels, aliases and descriptions that are attached to items, properties and queries. These are human-readable text to improve understanding of the scope of the item; for example the specific type of real world entity. If they are missing some of them can be replaced by strings from alternate languages, following the language fallback chains.

Language fallbacks (language chains) are methods to systematically replace missing language attributes with strings from alternate languages. The exact replacement rules can be chosen depending on the type of page, whether the user is logged in, or if so if the user has provided information about his preferred languages.

The mainspace is the namespace where all items are located. It is distinguished by its lack of a prefix.

MediaWiki is the software that runs projects like Wikipedia and Wikimedia Commons; see MediaWiki.

Meta pages are all pages that are not (entities, i.e. do not belong to the data namespaces. Wikidata meta pages contain unstructured content represented by conventional Mediawiki code, and perhaps also future Wikidata client side inclusion code. Examples are talk pages, category pages, project pages (in the Wikidata namespace) and help pages (in the help namespace). Meta pages also comprise content and data automatically generated by the Mediawiki software, for example the edit history of a page, or special pages.

Namespace is a physical division of pages in MediaWiki to group them according to overall use or some additional behavior. Examples are namespaces for categories, files, users, and in the case of Wikidata namespaces for items, properties and queries.


Page means a page in some wiki with a unique title, for example an article (a page in Wikipedia main namespace). In Wikidata, the term page may refer to an #Entity page (in the data namespaces), an meta page (in other namespaces) or a linked page (an external page in any Wikipedia or other Wikimedia wiki site), that is references using a sitelink. Pages in the main namespace of Wikidata are about items, and one page can only hold one item.

Project is a term often used in the Wikimedia movement. In most cases, people mean a Wikimedia Wiki. So in Wikidata, the term usually refers to Wikidata itself.

Property is the descriptor for a data value or set of values, but not the data value or values themselves. Each claim at an item page links to a property, and assigns the property one or several values. The property is stored as an entity page in the Property namespace, and includes a declaration of the the datatype of the property values. New properties are suggested and motivated at Wikidata:Property proposal. All properties should be listed at Wikidata:List of properties‎ (WD:P). Usage of the property is also discussed at its talk page. Most properties can be mapped to Wikipedia infobox parameters and categories, see Wikidata:Infoboxes task force. The inclusion of property values in Wikipedia infoboxes (using inclusion syntax) is done for each infobox and Wikipedia version individually.


Qualifier is a part of the claim that says something about the specific claim, often in a descriptive way. A qualifier might be a term according to a specific vocabulary but can also be a variant descriptive phrase (if those terms or phrases are free text or part of some vocabulary would probably be up to the Wikidata community).


Query is predefined search across items. A query is the descriptor for the predefined search, but not the hits generated by the search. Each search is described and defined on its own page, and have their own prefixed identifier.

Wikidata:SPARQL query service

Rank is a quality factor used for simple selection/filtering in cases where there are many statements for a given property. There are three possible ranks:


Reference (or source) describes the origin of a statement in Wikidata. A source is often an item in its own right; for example, a book. Wikidata does not aim to answer the question of whether a statement is correct, but merely whether the statement appears in a reference. What constitutes valid references is expected to be a question of debate among the Wikidata editors.


Site is a reference to an external website in general, but in sitelinks it refers to specific registered websites that can be used for internal lookup. Those sites are referenced by global site identifiers or for short siteid. For example the English Wikipedia´s siteid is enwiki. Usually the initial letters are followed by the subdomain of the registered site at Wikimedias projects. Linking to such sites can have constraints. In the current setup each external page can have only one link registered in Wikidata and one item can only have one link to each external site.

Sitelink is an identification of a linked page or article on another Wikimedia site such as a Wikipedia language version. It consists of a site identifier and a Sitelink-title (the article title), and go from individual items in Wikidata. They are used both for identifying an item from an external site, and as a central storage of interlanguage (interwiki) links. Sitelinks can have attached badges and will usually show that a page has been a featured article, or of similar status. See Help:Sitelinks.

Snak is a technical term of Wikibase software which data users are most likely to encounter when accessing Wikidata through the MediaWiki API. It refers to the combination of a property and either a value or one of the special cases "no value" and "unknown value". Snaks can be found in claims (then they are called main snaks) or in qualifiers as part of statements (then they are called qualifier snaks). E.g., in the statement "Emma Watson was a cast member of Harry Potter and the Philosopher's Stone in the role of Hermione Granger" there is a main snak "was a cast member of Harry Potter and the Philosopher's Stone" and a qualifier snak "in the role of Hermione Granger".

A statement is one piece of data about an item, recorded on one item page. In the simplest case, a statement is just a "property: value" pair (for example, "Location: Germany"), but often statements can have further qualifiers (such as temporal qualifiers). See Data model. Wikidata makes no assumptions about the correctness of statements, but merely collects and reports them with a reference to a source. See Help:Statements.


String (short for character string) is a general term for a sequence of freely chosen characters interpreted as text (e.g. "Hello")—as opposed to a data interpreted as a numerical value (3.14), a link to an item (e.g. [[Q1234]]) or a more complex datatype (the set {1,3,5,7} ). Wikidata will support datatypes "monolingual-text" and "multilingual-text", both considered as string datatypes, as the value of a property. For example, the hypothetical property "given name" for Abraham Lincoln would equal "Abraham".

Title is the name of an external linked page (known as Sitelink-title), the name of an meta page, or the Entity ID of an entity page. If the page does not belong to the main namespace, the title includes the namespace:id.

Values (or datavalues) are the information pieces embedded in each claim. Depending on their datatype, they can be a single value (like a number) or a value consisting of several parts (like a geographical position with longitude and latitude). Internally they are connected to the claims through snaks.


Wikibase is the software behind Wikidata. It consists of three MediaWiki extensions: Wikibase, Wikibase client, and WikibaseLib. The Wikibase extension (for the Wikidata server, often called just repo) allows a MediaWiki installation to collect and maintain structured data and will be used on the Wikidata website. The Wikibase client extension (often called just client) enables MediaWiki installations to query and display data from a Wikidata server on its own pages, and will be deployed on Wikipedias in different languages, and probably on other sites. The WikibaseLib extension has common libraries for both of the major extensions.


Wikidata is a Wikimedia project that runs an instance of MediaWiki with the Wikibase extensions. It allows Wikidata editors to enter data and browse pages.

Wikimedia is the name of a movement which consists of people and organizations. Wikidata is run by the Wikimedia Foundation together with other wikis such as Wikipedia. The Wikibase software is mainly developed by Wikimedia Germany which is one of the national Wikimedia affiliations.
Wiki is a concept for a website. Wikipedia and Wikidata are wikis. A wiki in general is a website that can be edited by the visitors.

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