http://www.w3.org/ns/prov#value | - Thanks Your solution is a variant of my code ikzset{add/.style args={#1 and #2}{to path={($( ikztostart)!-#1!( ikztotarget)$)--($( ikztotarget)!-#2!( ikztostar??????t)$) ikztonodes}}} and I discover with your example that I can use 1cm or 2cm.
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