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--- parent_sub-system [2023/02/28 15:01]
dmytroh
+++ parent_sub-system [2023/02/28 15:08]
dmytroh
@@ Line 1: / Line 1: @@
-====== Parent sub-system ======
+====== Parent sub-system and Root sub-system ======
+====Parent sub-system====
 In an hierarchy of [[Sub-system|sub-systems]], the parent sub-system of a [[Block|block]] or [[Sub-system|sub-system]] is the [[Sub-system|sub-system]] immediatly above it in the hierarchy.
-For instance, if the sub-system //Nature// contains a block named //Giraffe//, then //Nature// is the parent sub-system of //Giraffe//.
+{{forest_unit.png?200}}
+For instance, if the sub-system //Forest unit// contains a blocks named //Forest, Berries, Mushrooms and Game//, then //Forest unit// is the parent sub-system of //Berries// sub-system.
+{{parent_sub_system.png?500}}
-{{forest_unit.png?400}}
+==== Root sub-system ====
+The top-level [[Sub-system|sub-system]] of a model. The [[ID|id]] of the root sub-system is blank, so that [[Block|blocks]] that belong to it have the same [[ID|id]] as [[Name|name]].
 ===== See also =====
-  * [[Root_sub-system|Root sub-system]]
   * [[ID|ID]]
   * [[Name|Name]]

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