Context Navigation

Changes between Version 1 and Version 2 of IMMUTABLE_TREE_R0

-                      v1
+                      v2
 = Analysis =
-^(Give as much as possible of the needed information for designing and implementing the task in the following sections.)^
 == Overview ==
+^(Provide a brief overview of the whole task in its first revision. Stick to the current revision of the task, but keep an eye to the whole task progress, and stay alert for possible smells.)^
+In order that new project's persistence could be implemented, immutable structures are needed - like immutable tree. Immutability requires that every operation delivers new object - tree, in which changes (one defined by the operation) are made, in same time not modifying the tree of origin.
 == Task requirements ==