DRC custom design rule question (again)

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On one of my boards, I have a MSOP10 that needs 0,2mm inter-pad clearance. I do not want to set my entire board that low, so I drew a rule area named ‘clearance_ok’ on F.Cu, enclosing the area of interest and wrote a DRC rule:

#ignore clearance violations in rule area(s) ‘clearance_ok’
(rule allow_clearance_violation
(constraint clearance (min -1mm))
(condition “A.insideArea(‘clearance_ok’)”))

The mechanism works for other errors like silkscreen clearance, but not for this case.

@JeffYoung Is it that the general minimum clearance cannot be overruled by a custom rule?

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Correct. That’s the one auto-generated rule that cannot be overridden.

You can leave the board clearance at 0 and have 2 rules. For instance:

(rule std_clearance
    (constraint clearance (min 0.5mm)))
(rule MSOP10
    (constraint clearance (min 0.2mm))
    (condition "A.insideArea('MSOP10')"))
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@JeffYoung Yeah, sure, thx. sigh
How about text substitution in rules so one could have their own specific constraint or whatever parameters and use them in generalized rules?
Just dreaming…

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There’s actually already a feature request for that:

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5

That looks, well, huge.
Maybe simple text variables substitution as a first step?

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