VizKG 1.0.8

Visualization library for SPARQL query results

VizKG

VizKG, a visualization library for SPARQL query results over KGs. VizKG links SPARQL query results and external visualization libraries by mapping query variables to the visualization components needed, currently allowing for 24 types of visualizations. Not only that, VizKG also provides visualization recommendations for arbitrary SPARQL query result.

Installation

Use the package manager pip to install VizKG.

pip install VizKG

Usage

# Import the library
import VizKG.visualize as vkg

Visualization Recommendation

VizKG returns the automated visualization when there is no chart type preference given.

#Wikidata: Covid-19 Recoveries, Cases, and Death Growth
sparql_query = """
SELECT ?time ?Recoveries ?Cases ?Deaths WHERE {
  {
    SELECT ?time ?Recoveries WHERE {
      wd:Q84263196 p:P8010 ?countRes .
      FILTER NOT EXISTS { ?countRes pq:P276 ?loc }
      ?countRes ps:P8010 ?Recoveries ;
                   pq:P585 ?time .
    }
  } 
  {
    SELECT ?time ?Cases WHERE {
      wd:Q84263196 p:P1603 ?countRes .
      FILTER NOT EXISTS { ?countRes pq:P276 ?loc }
       ?countRes ps:P1603 ?Cases ;
                   pq:P585 ?time .
    }
  } 
  {
    SELECT ?time ?Deaths WHERE {
      wd:Q84263196 p:P1120 ?countRes .
      FILTER NOT EXISTS { ?countRes pq:P276 ?loc }
       ?countRes ps:P1120 ?Deaths ;
                   pq:P585 ?time .
    }
  }
}
"""
sparql_service_url = "https://query.wikidata.org/sparql"
chart = vkg(sparql_query=sparql_query, sparql_service_url=sparql_service_url)
chart.plot()

Use Case Examples

Wikidata: COVID-19 Vaccine Origins

sparql_query = """
SELECT DISTINCT ?vaccineLabel ?originCountry  {
  ?vaccine wdt:P1924 wd:Q84263196 .
  ?vaccine wdt:P178 ?developer.
  ?vaccine rdfs:label ?vaccineLabel .
  ?developer wdt:P17 ?origin . 
  ?origin rdfs:label ?originCountry .
  FILTER (LANG(?vaccineLabel) = 'en').
  FILTER (LANG(?originCountry) = 'en').
}LIMIT 25
"""
#to query another endpoint, change the URL for the service and the query
sparql_service_url = "https://query.wikidata.org/sparql"
chart = vkg(sparql_query=sparql_query, sparql_service_url=sparql_service_url, chart='sunburst')
chart.plot()

DBpedia: Map of Temples in Indonesia

sparql_query = """
SELECT * WHERE {
  ?item dbo:wikiPageWikiLink dbr:Candi_of_Indonesia;
        geo:geometry ?geo .
  ?item rdfs:label ?itemLabel.
  FILTER((LANG(?itemLabel)) = "en")
}
"""
#to query another endpoint, change the URL for the service and the query
sparql_service_url = "https://dbpedia.org/sparql/"
chart = vkg(sparql_query=sparql_query, sparql_service_url=sparql_service_url, chart='map')
chart.plot()

OU_UK: Number of Employees by Job Title

sparql_query = """
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX schema: <http://schema.org/jobTitle>

SELECT DISTINCT ?jobTitle (COUNT(?jobTitle) as ?count) WHERE {?s a foaf:Person .
  ?s <http://schema.org/jobTitle> ?jobTitle .
  FILTER (lang(?jobTitle) != 'en')
}
GROUP BY ?jobTitle
HAVING (?count > 10)
"""
#to query another endpoint, change the URL for the service and the query
sparql_service_url = "https://data.open.ac.uk/sparql"
chart = vkg(sparql_query=sparql_query, sparql_service_url=sparql_service_url, chart='TreeMap')
chart.plot()

Budaya KB: Number of Temples by Indonesian Regencies

sparql_query = """
prefix bkb: <https://budayakb.cs.ui.ac.id/ns#>
prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>


SELECT ?provLabel (COUNT(?temple) AS ?numTemple) WHERE {
  ?temple a bkb:Candi .
  ?temple bkb:locationInProvince ?prov .
  ?prov rdfs:label ?provLabel.
  FILTER (lang(?provLabel) = 'id')

} GROUP BY ?provLabel
ORDER BY DESC(?numTemple)
"""
#to query another endpoint, change the URL for the service and the query
sparql_service_url = "https://budayakb.cs.ui.ac.id/budaya/sparql"
chart = vkg(sparql_query=sparql_query, sparql_service_url=sparql_service_url, chart='bubble')
chart.plot()

Supported Visualizations

• Table
• ImageGrid
• Map
• Graph
• Tree
• Dimensions
• Timeline
• WordCloud
• Histogram
• Density Plot
• Box Plot
• Violin Plot
• Line Chart
• Bar Chart
• Area Chart
• Stacked Area Chart
• Bubble Chart
• Scatter Chart
• HeatMap
• Radar Chart
• Tree Map
• SunBurst Chart
• Pie Chart
• Donut Chart

Related Work

Tool	Framework	Data Source	Input Type	Number of Chart Types
Wikidata Query Service	Web-based	Wikidata only	SPARQL SELECT	14
Dataviz	Web-based	Wikidata only	SPARQL SELECT	23
YASGUI	Web-based	Generic	SPARQL SELECT and SPARQL CONSTRUCT	11
LDVizWiz	Web-based	Generic	SPARQL SELECT/ASK and RDF Data	27
Sparklis	Web-based	Generic	Text	4
Quedi	Web-based	Generic	Text	16
Voyager	Web-based	Generic	Tabular Data	5
S-Paths	Web-based	Generic	RDF Data	10
Gastrodon	Python Library	Generic	RDF Data	-
kglab	Python Library	Generic	RDF Data	1
Autoviz	Python Library	Generic	Tabular Data	5
Visualizer	Python Library	Generic	Tabular Data	20