DMN12 — Decision table is not a good example of a builtin function

10.3.2.11 Function Semantics
FEEL functions can be
 built-in, e.g., decision table (see 10.3.4.6 Decision Table), or

Actually, decision table is not a real builtin function (as DMN12-81 points out), so a better example is something like sum()

should remove textual decision table builtin (ch 10) and use schematic DT boxed expr instead (something like Figure 36)

remove all mention of decision table builtin function

Decision tables are an aggregation of LiteralExpressions, UnaryTests, and other things, but are not actually builtin functions because UnaryTests have no interpretation by themselves. See Revised Text.