How a field seeds its initialValue, once at materialisation (advisory
after — the field stays freely editable). Absent means working memory: the
field starts empty and an op fills it later, spelled by omission rather
than an arm. Distinct from ValueExpr, an op's write payload; they
overlap only on the literal and field-read arms.
How a field seeds its
initialValue, once at materialisation (advisory after — the field stays freely editable). Absent means working memory: the field starts empty and an op fills it later, spelled by omission rather than an arm. Distinct from ValueExpr, an op's write payload; they overlap only on the literal and field-read arms.