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|context> => |context: sw console>

supported-ops |Fred> => |op: age> + |op: friends> + |op: height>
age |Fred> => |age: 23>
friends |Fred> => |Sam> + |Harry> + |Mazza>
height |Fred> => |cm: 177>

supported-ops |*> => |op: star> + |op: op-star>
star |*> #=> apply-sp(supported-ops |_self>,|_self>)
op-star |*> #=> apply-sp(op-self supported-ops |_self>, |_self>)

supported-ops |op: age> => |op: op-self>
op-self |op: age> => 0.5|op: age>

supported-ops |op: friends> => |op: op-self>
op-self |op: friends> => 30.0|op: friends>
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