Frame Type

is Structure between round- and Square-Brackets

The generic template collapses if either the Type or the Content is Void-Equivalent. There are Categories of frames that all have the same frame-type. In Arrangement, collect gathers together framed-content that has in common the same frame-type. (p. 198)

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BRICKEN, William, 2019. Iconic Arithmetic Volume I: The Design of Mathematics for Human Understanding. Unary press. ISBN 978-1-73248-513-6, p. 193–194, 198.

The Arrangement axiom gives permission to take multiple forms out of the interior Content of a Frame and put them into separate frames, so long as we carry their Context — i.e. their frame type, (A [...]) — along with them.