Document that polymorphic archives require an nvp - #385
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gennaroprota merged 1 commit intoAug 18, 2026
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Which archive a polymorphic one stands for is settled at run time, so a value written through it has to carry a name in case that archive turns out to be an XML one, where values are elements. A templated XML archive rejects an unnamed value where it is written, but the polymorphic interface cannot: at that point it does not yet know what it is writing to. In the absence of a name, the value goes out with no element around it and the document will not read back. Reported in #189.
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Which archive a polymorphic one stands for is settled at run time, so a value written through it has to carry a name in case that archive turns out to be an XML one, where values are elements. A templated XML archive rejects an unnamed value where it is written, but the polymorphic interface cannot: at that point it does not yet know what it is writing to. In the absence of a name, the value goes out with no element around it and the document will not read back.
Reported in #189.