: Buyer-hosted, Supplier-hosted, third-party-hosted .
Buyer-hosted , -. -:
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Supplier-hosted , Web-, -. - :
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third-party-hosted , , ( ) . - punch-out , . , , , . , ( -).
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40. punch-out/roundtrip . .
, ("punches out") Web- . Web - .
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41. punch-out/roundtrip . .
Punch-out/roundtrip Web- . Web- . Web- , Web- .
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