Node types known to the schema
Examples
schema_node_types()
#> [1] "set_decl" "mapping_decl" "parameter_decl" "variable_decl"
#> [5] "equation_decl" "set_ref" "mapping_ref" "parameter_ref"
#> [9] "variable_ref" "symbol" "dims" "constant"
#> [13] "expression" "unary" "when" "func"
#> [17] "sum" "prod" "setmin" "setmax"
#> [21] "shift" "call" "where"
