User:Epìdosis/Wikidata-intro

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Authority control - basic[edit]

Introduction[edit]

Structure[edit]

Authority control[edit]

GLAM - basic[edit]

Introduction[edit]

Use on Wikipedia[edit]

Some cases[edit]

Practice - basic[edit]

Storia e struttura[edit]

Alcuni usi dei dati[edit]

General - basic[edit]

Introduction[edit]

Use on Wikipedia[edit]

Structure[edit]

Visualizing data[edit]

Some tools

Some data reusers

Examples of projects

Queries[edit]

Editing data[edit]

Some tools for editing Wikidata

User gadgets

Guidelines[edit]

Comunità di Wikidata[edit]

Introduzione:

Link per l'utente:

Link per la comunità:

Wikidata community[edit]

Ontology[edit]

Video: DSI Webinar - The ontology of Wikidata: how to interact with it for a better quality (20/06/2023)

  1. how it works
    1. ontology (Q324254): specification of a conceptualization in computer science and information science
    2. Wikidata:WikiProject Ontology
    3. the main visualization tool: Wikidata Graph Builder
    4. (Wikidata:Notability)
    5. Help:Basic membership properties crucial guide
      1. crucial properties
        1. instance of (P31): that class of which this subject is a particular example and member; different from P279 (subclass of); for example: K2 is an instance of mountain; volcano is a subclass of mountain (and an instance of volcanic landform)
        2. subclass of (P279): this item is a subclass (subset) of that item; all instances of this item are instances of that item; different from P31 (instance of), e.g.: K2 is an instance of mountain; volcano is a subclass of mountain (and an instance of volcanic landform)
        3. part of (P361): object of which the subject is a part (if this subject is already part of object A which is a part of object B, then please only make the subject part of object A), inverse property of "has part" (P527, see also "has parts of the class" (P2670))
      2. other useful properties
        1. opposite of (P461): item that is in some way the opposite of this item
        2. different from (P1889): item that is different from another item, with which it may be confused
        3. partially coincident with (P1382): object that partially overlaps with the subject in its instances, parts, or members
        4. said to be the same as (P460): this item is said to be the same as that item, though this may be uncertain or disputed
  2. why it is important
    1. in itself, to classify entities (like a thesaurus)
    2. in general, to make inferences
  3. how to find and try to solve issues
    1. a list of issues: Wikidata:WikiProject Ontology/Issues (from File:WikidataCon 2021 - Overview of ontology issues.pdf)
    2. issue prioritization: Wikidata:Ontology issues prioritization (File:Wikidata ontology issues — suggestions for prioritisation 2023.pdf)

Statistics (on 18-06-2023) on items (total: 104 328 421; without both properties: 2 442 134) containing:

Property in total with the other without the other
instance of (P31) 100 425 738 2 544 693 97 881 045
subclass of (P279) 2 899 745 2 544 693 355 052
  • consequently, the ontology of Wikidata is constituted by ca. 2.9 M items (overview)

> item created as example (20-06-2023): ancient mosaic (Q119789177)

See also[edit]

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