Using the flow editor, you can associate a mapping routine with certain types of items in a flow (see Artifacts from which mapping routines can be referenced).
When a flow is being performed in a runtime environment, and the runtime environment processes an item with which a mapping routine is associated, then the runtime environment performs the mapping routine.
When the runtime environment performs a mapping routine, it performs each mapping in the mapping routine one after another, from top to bottom.
A mapping routine can contain 0, 1, or multiple mappings. If a mapping routine is empty (has 0 mappings) then even if it is associated with one of the items in the preceding list, it has no effect on a flow (no runtime code is generated).
A mapping routine is stored in a mapping file and can be modified in the mapping editor (see Mapping files and Mapping editor).
Mapping routines are used for a somewhat different purpose in terminal flows than in nonterminal flows (see Mapping routines in terminal flows and in nonterminal flows).
<node_name>.<p>_<terminal_name>
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