The Reference and its editions

The Reference answers working questions about selection, combination, field structure and missing contributions. It leads to the full Methods and evidence. Its answers can also use outside suppliers without making those fields constituents of this Suite.

When a supplying Method changes, reconsider only the answers whose meaning or applicability can change. A Reference edition must distinguish available results, descriptions of Methods and contributions still missing. A date or an accessible title does not establish that an answer remains suitable. A known sufficient DPF contribution can be used directly without a Reference detour.