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--- calc_lookup_table_union [2015/10/13 20:13]
admin
+++ calc_lookup_table_union [2026/08/28 03:11] (current)
hermann Sync from local documentation review
@@ Line 1: / Line 1: @@
 ====== Calc Lookup Table Union ======
 ===== Description =====
-This functor calculates a lookup table that is the union of two lookup tables.
+Calculates the lookup table that is the union of two lookup tables.
 ===== Inputs =====
@@ Line 14: / Line 14: @@
 ^ Name  ^ Type  ^ Description  ^ Default Value  ^
-| Use First Table To Solve Duplicated Key  | [[Boolean Value Type]]  | If true, in the case of duplicated keys, the value of the first table is selected; otherwise, the value of the second table is selected.  | True          |
+| Use First Table To Solve Duplicated Key  | [[Boolean Value Type]]  | If true, and a key occurs in both tables, the value from First Table is kept; if false, the value from Second Table is kept instead.  | True  |
-===== Output =====
+===== Outputs =====
 ^ Name  ^ Type  ^ Description  ^
-| result  | [[Lookup Table Type]]  | The resulting lookup table.  |
+| Result  | [[Lookup Table Type]]  | The resulting lookup table, containing every key present in First Table or Second Table (or both).  |
 ===== Group =====
-[[Functor List#Table | Table]]
+[[Functor List#Lookup Table | Lookup Table]]
 ===== Notes =====
-The column names from the first input table are assigned to the output table.
+The key and value column names of Result are inherited from First Table.
-For further information about set intersection, see [[wp>Set_union]].
+For background on this operation, see [[https://en.wikipedia.org/wiki/Union_(set_theory)|set union]].
 ===== Internal Name =====