The Successive refinement of evergreen notes will, over time, in addition to become deeply-linked (Link evergreen notes by contextual association), develop a narrative structure. This is a key idea in order for Digital gardens promote knowledge accumulation, as knowledge requires a narrative structure to provide context and to assist with its recall.
Initially evergreen notes may sprout from an unordered bulleted list of ideas, thoughts and related concept. The act of Curation of ideas broadens horizons and helps draw patterns will provide the overarching narrative. Curiously, this is why evergreen notes tend to be personal (These notes are for me), as two authors deriving evergreen notes from the same resource will do so differently according to their own mental model.