Negative corner radius (per ISO 1101)?

#1
Good afternoon all. Hoping to get a bit of help understanding a callout on a print. Don't really comprehend per my GD&T exposure.

Corner/edge callout, not tied to any detail or section of the overall part.

Specified as a negative 0.1. Used to a minimum edge radius but not a negative value.

Callout to ISO 1101 for form and geometrical tolerances, which I don't currently have access to.

Thanks in advance for any help you can provide!!!


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#2
can you share the big picture...i.e. the whole drawing or at least the aprt and maybe the title block?
 
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