Definition. Factors that increases the severity or culpability of a criminal act, including, but not limited to, heinousness of the crime, lack of remorse, and prior conviction of another crime. Recognition of particular aggravating circumstances varies by jurisdiction.
Detailed information for file extension XTR: Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.
The file extension you mentioned above is .pkg. pkg is basically a file which is designed for Apple's MAC. And iPhone also uses this file extension.