Wikidata:WikiProject Informatics/Structures/Character encodings

Goals

Long term goals

• For Wikidata to become the most comprehensive resource for information on character encoding systems
• For Wikipedia to extensively use data from Wikidata on articles relating to computer and telecommunication systems

Short term goals

• Define and reach agreement on an ontology for character encoding systems
• Advertise for and encourage new contributors to join the project
• Commence detailed definition of popular and widely used character encoding systems to encourage development of an ontology, and to raise awareness of this project

Automatic lists

TODO

Useful queries

• Return a list of all instance of (P31) or subclass of (P279) of grapheme (Q2545446)

SELECT ?item ?itemLabel
WHERE {
  ?item wdt:P31*/wdt:P279* wd:Q2545446 .
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
}

Try it!

• Return a list of all instance of (P31) or subclass of (P279) of character set (Q184757)

SELECT ?item ?itemLabel
WHERE {
  ?item wdt:P31*/wdt:P279* wd:Q184757 .
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
}

Try it!

• Return a list of all instance of (P31) or subclass of (P279) of coded character set (Q29149990)

SELECT ?item ?itemLabel
WHERE {
  ?item wdt:P31*/wdt:P279* wd:Q29149990 .
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
}

Try it!

• Return a list of all instance of (P31) or subclass of (P279) of code page (Q184766)

SELECT ?item ?itemLabel
WHERE {
  ?item wdt:P31*/wdt:P279* wd:Q184766 .
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
}

Try it!

• Return a list of all instance of (P31) or subclass of (P279) of code point (Q1105784)

SELECT ?item ?itemLabel
WHERE {
  ?item wdt:P31*/wdt:P279* wd:Q1105784 .
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
}

Try it!

• Return a list of characters (symbol), and the UNICODE characters associated with each.

SELECT ?item ?itemLabel ?unicode
WHERE 
{
  ?item wdt:P31 wd:Q3241972.
  OPTIONAL{?item wdt:P487 ?unicode.}
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}

Try it!

• Return a list of characters (computing), and the UNICODE characters associated with each.

SELECT ?item ?itemLabel ?unicode
WHERE 
{
  ?item wdt:P31 wd:Q32483.
  OPTIONAL{?item wdt:P487 ?unicode.}
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}

Try it!

Properties & structure of items

TODO: identify properties applying to graphemes, code pages, character encodings/etc

Property proposals in progress:

• Coded Character Set Identifier (CCSID)
• Code Page Identifier (CPGID)
• Graphic Character Global Identifier (GCGID)
• Graphic Character Set Global Identifier (GCSGID)

Wikipedia Navboxes

TODO