Dhx1

Userboxes 123,000+This user has made over 123,000 contributions to Wikidata. This user runs a bot, RfcBot (contribs). This user is a member of WikiProject Australia. This user is a member of WikiProject Informatics. This user is a member of WikiProject Properties. This user is a member of WikiProject COVID19. This user uses QuickStatements. This user loves OpenRefine. This user reads and edits Wikidata from the command line using wikibase-cli. This user has an advanced understanding of the Pywikibot software library.

Babel user information
en-N This user has a native understanding of English.
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Contact details

E-mail: david@hicks.id.au

Projects

I have interests in the following projects:

• Australia
• Informatics
• Datasets
• Protected Areas
• Food
• Electrical Grids
• COVID-19
• International relations
• Properties
• Property constraints
• Shape Expressions

Bots

I look after and run the following bots:

• User:RfcBot

Example queries

List RFC standards whose titles contain "SMTP", displaying their main subjects

The following query uses these:

• Items: Request for Comments (Q212971)   

• Properties: instance of (P31)   , title (P1476)   , main subject (P921)   , RfC ID (P892)   

  SELECT ?RfC_ID ?Request_for_Comments ?Request_for_CommentsLabel ?main_subject ?main_subjectLabel ?RfC_IDLabel WHERE {
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
    ?Request_for_Comments wdt:P31 wd:Q212971.
    ?Request_for_Comments wdt:P1476 ?title.
    OPTIONAL { ?Request_for_Comments wdt:P921 ?main_subject. }
    OPTIONAL { ?Request_for_Comments wdt:P892 ?RfC_ID. }
    FILTER regex(str(?title), "SMTP")
  }
  ORDER BY ?RfC_ID
  

Try it!

Equations used to calculate qualities of investment strategies

The following query uses these:

• Items: trading strategy (Q1574928)   

• Properties: instance of (P31)   , subclass of (P279)   , has characteristic (P1552)   , defining formula (P2534)   

  SELECT ?trading_strategy ?trading_strategyLabel ?classLabel ?quality ?qualityLabel ?equation WHERE {
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
    ?trading_strategy wdt:P31*/wdt:P279* wd:Q1574928.
    ?trading_strategy wdt:P279 ?class.
    ?trading_strategy wdt:P1552 ?quality.
    OPTIONAL { ?quality wdt:P2534 ?equation }.
  }
  

Try it!