Ok, was able to read. Thank you. Event kind identifies a type of data for a use case. NIP-31 gives an alt tag so apps seeing an unrecognized kind can still display a text description for context. NIP-89 lets users discover microapps from other Nostr users for handling a kind, so that we can have a free market for microapps instead of being vulnerable to centralized control by an app store. This also decentralizes control by verticalized silos that tie data to apps. Brilliant.