InaSAFE Disaster risk assessment tool by AusAid - Standard signal defs.
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This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
These signals are defined for global use throughout the safe and InaSAFE application. They provide context for when parts of the application want to send messages to each other.
See: https://github.com/AIFDR/inasafe/issues/577 for more detailed explanation.