As asked in the title I'd like to know which ER-model notation Elasticsearch defaults to. In terms of context, I've received a database schema which I cannot openly share, but the following screenshot shows one of the obscure looking relations.

After a few quick Google searches I was surprised at the fact that I couldn't find any official statement about Elasticsearch's default notation. While searching I came across this post where the OP showed a similar screenshot, but without the obscure double-dashed-line notation: https://discuss.elastic.co/t/convert-relational-schema-to-elasticsearch-mapping/72291

Is this Crow's Foot Notation, or something else?

CodePudding user response：

there's no official model notation that is used for Elasticsearch, so it'd come down to whatever the tool that built this uses