Graph Statistics

A page to help show the structure of the graph using metrics and statistics. For similar pages reference:

• GraphStructure
• DebugQueries
• Query Service

Simple Metrics

ItemCount

Gives a count of all items in the Wikibase-instance. Items used: Student (Q167)

Properties used: instance of (P3)

#defaultView:Table
PREFIX wd:  <https://graphit.ur.de/entity>
PREFIX wdt: <https://graphit.ur.de/prop/direct/>
SELECT (COUNT(*) as ?items) 
WHERE {
  # items that have 0+ statements
  ?item wikibase:statements ?s.
  MINUS{ ?item a wikibase:Property } # Filter out properties
  MINUS{ ?item wdt:P3 wd:Q167 } # Filter out students
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
} LIMIT 25

Try it!

Make inline

PropertyCount

Gives a count of all properties in the Wikibase-instance

#defaultView:Table
PREFIX wd:  <https://graphit.ur.de/entity>
PREFIX wdt: <https://graphit.ur.de/prop/direct/>
SELECT (COUNT(*) as ?property) 
WHERE {
  ?property a wikibase:Property.
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
} LIMIT 28

Try it!

Make inline

Degree of Item

Gives back the indegree and outdegree of a specific item.

• InDegree = all dependencies (P1) going in to the item
• OutDegree = all dependencies (P1) comming out of an item

To get all edges coming out of an item, change wdt:P1 to ?p. This will include things such as resources and dates.

Items used: Matrix Multiplication (Q93)

Properties used: depends on (P1)

#defaultView:Table
PREFIX wd: <https://graphit.ur.de/entity/>
PREFIX wdt: <https://graphit.ur.de/prop/direct/>
Select ?item ?itemLabel # ?degreeLabel
(count(DISTINCT ?inItem) as ?inDegree)
(count(DISTINCT ?outItem) as ?outDegree)
WHERE { 
  BIND (wd:Q93 as ?item).
  OPTIONAL {
    ?inItem wdt:P1 ?item. # inDegree
    ?item wdt:P1 ?outItem. # outDegree
  } 
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
} group by ?item ?itemLabel

Try it!

Change harcoded item to parameter