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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 different granule_gid (and a specific granule_uid, see Table 2 below).

It is recommended to link only one product per Each line in the epn_core view must describe only one product (plus a thumbnail wherever relevant). The notion of "main product" (more or less explicit in v1) is therefore deprecated, and the epn_core view in v2 includes more lines than in v1. Although less compact that the previous table presentation, this list presentation is much more efficient for machine-handling.