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In the Enterprise Edition, you can configure User permissions based on Tag/Edge. https://docs.nebula-graph.io/master/7.data-security/1.authentication/3.role-list/#basic_roleenterprise_edition

Thanks a lot for your help!! Actually, we want to embed some of Explorer's features into our own front-end pages, e.g. automatic graph generation by query statements, and I see in the manual that we can call the api to get the data, but there is no graph. Does Nebula have this kind of functionality to share links directly into the frontend?

Appears that you can embed Explorer via an iFrame: https://docs.nebula-graph.io/3.5.0/nebula-explorer/iframe/