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Table 4 Characteristics of tested queries

From: An empirical study on the evaluation of the RDF storage systems

Characteristic Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12
Simple query × × ×
filters × ×   ×
More than 6 patterns × × × × ×
Optional operator ×
Limit modifier ×
Offset modifier ×
Union operator × × ×
Distinct operator × × × × × ×
Order by ×
And operator × × × × × × × × × × ×
Or operator ×
Type of query SQ SQ SQ SQ TQ ST TQ TQ CQ CQ
  1. SQ start query; TQ tree query; CQ chain query