To HTML Content Category Metadata

Html elements command, kbd, and dfn

command element The command element represents a command which the user can invoke, kbd element Specifies that the enclosed text should be formatted as keyboard input, dfn element Specifies that the enclosed text defines a term. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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command command and kbd, command, kbd, and dfn

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