This is the source code of the ijcai21 paper 'Keyword-Based Knowledge Graph Exploration Based on Quadratic Group Steiner Trees.'

Directory /src/main/java/ contains all the source code based on JDK 11.

• 'b3f' is the proposed algorithm B3F.
• 'dpbf' is our compared baseline method.
• 'graphdeal' contains the code to write graphs to database.
• 'experiment' is to reproduce our experiments. 'TestAllGivenNode' is to run on MONDIAL and DBpedia. 'TestAllLubmNode' is to run on LUBM. 'AnsSummary' is to summarize the results.

Directory /src/main/resources contains all the queries for MONDIAL and DBpedia.