Spw Operator
< Concept
The concept operator opens a topical field you can carry. The mark is the aperture. A later action, mode, or direction can still belong to it. > is the projection of that field, a different sign.
Contract
In hand
Open a topical field and carry it into a later action, mode, or direction. The territory stays available for the next move.
What it means
The mark is an aperture, the opening through which a relation enters, before anything is rendered. A later move can still belong to the territory this opening named.
Brace Physics
The brace holds one capsule. What is inside shares a territory. The surface edge can close it.
Before and after
Prefix <x opens the field. The matching > projects that field outward. Opening and projecting are a pair.
Example
<composition
?boundary
>surface
Take this example apart in the parser: each mark becomes a token you can inspect, and the parser says whether the source rebuilds exactly.