Source
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Changelog entries are prefixed with a position-based identificator, that denotes
components affected with that specific issue. Component one-letter codes are
as follows:
* API (A)
* Documentation (D)
* Frontend (F)
* Agent (G)
* Installation (I)
* Java gateway (J)
* Appliance (L)
* Proxy (P)
* Server (S)
* Templates (T)
A line, referencing all components would thus be ADFGIJLPST
API and frontend would be A.F.......
Server and proxy would be .......PS.
Commit messages that do not actually change anything (for example, creation and
deletion of branches) have all components unset - ..........
See https://www.zabbix.com/documentation/guidelines/en/devel#components
for more information