1 Introduction  
2 Preliminary  
2.1 Knowledge Graph Embedding  
2.2 Knowledge Extrapolation Settings  
3 Methods  
3.1 Entity Extrapolation  
3.2 Relation Extrapolation  
4 Benchmarks  
5 Comparison and Discussion  
5.1 Assumption on Entity Extrapolation  
5.2 Information in Support Set  
6 Future Prospects  
6.1 Diverse Application  
6.2 Multi-modal Support Information  
6.3 Entity and Relation Extrapolation  
6.4 Temporal and Lifelong Setting  
7 Conclusion