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As a general rule, different products related to the same observation are no longer described together on a single line of the epn_core view, but on successive lines associated by the same obs_id, each with a specific granule_guid uid (see Table 2 below).
It is recommended to link only one product per line in the epn_core view (plus a thumbnail wherever relevant). The notion of "main product" is therefore deprecated. Although less compact, this list presentation is much more efficient for machine-handling.
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