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I'm reading the tutorials and got problems understanding the start and end of a link. For example, here are 3 links between hs1 and /hs[2-4]/

ID  start end   ID  start end
hs1 100   200   hs2 250   300
hs1 400   550   hs3 500   750
hs1 600   800   hs4 150   350

To my understanding that only two points are needed for a link. Just couldn't understand why 4 points are needed here. And the docs says only the start and end of the link as well as some other tutorials online.

kbxu
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    I tried some test data and think it's the middle point between START and END that connected to the other. – kbxu May 05 '14 at 05:42

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