“Generic” HLRT wrapper

procedure ExtractAttributes: skip past h while l1 before t 1. extract 1st attribute between l1 and r1  . . . K. extract Kth attribute between lK and rK

HLRT wrapper ? 2K+2 strings ?h , t , l1 , r1 , …, lK , rK?

K = # attributes

head delimiter

tail delimiter

left delimiter

right delimiter

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