1 What is meta-learning?  
2 Meta-learning milestones  
2.1 Learning to embed: metric-based meta-learning  
2.2 Learning to fine-tune: optimization-based meta-learning  
3 Progress specific to few-shot NLP  
3.1 Meta-learning within a problem  
3.2 Meta-learning on distinct problems  
4 Datasets for few-shot NLP  
4.1 Class as task  
4.2 Domain as task