ElasticSearch edgeNGram and edge_ngram difference

Question

In ES i saw an edge_ngram tokenizer (https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-edgengram-tokenizer.html) and edgeNGram type (ElasticSearch edgeNGram). Isn't the egde_ngram tokenizer just an alias for tokenizer of type edgeNGram?

Answer 1

Both edge_ngram and edgeNGram were accepted until 7.6.

As of 7.6, edgeNGram has been deprecated in favor of edge_ngram which should be used as of that version.