README.md

Knowledge is graphs

The purpose of this repository is to collect sample queries for discovering HDF-related information in the Wikidata knowledge graph.

Relevant entities

• Hierarchical Data Format (Q1069215)
• HDF5 (Q61080677)
• HDF4 (Q63065200)
• Highly Scalable Data Service (Q114859023)
• HDFView (Q130060108)

Relevant properties

• readable file format (P1072)
• writable file format (P1073)

Example

List subjects that are capable of reading or writing HDF:

SELECT DISTINCT ?x ?xLabel ?url WHERE {
  { ?x wdt:P1072 wd:Q1069215 . }       # Something that can read HDF
  UNION
  { ?x wdt:P1073 wd:Q1069215 . }       # Something that can write HDF
  
  OPTIONAL { ?x wdt:P856 ?url. }       # Official website

  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}

Try it!