In addition to the environment variables supplied for all external applications, the following environment variables are provided when an external application is launched from an alert.
| Environment Variable | Description |
| SP_ALERT_CLASS **SP_ALARM_CLASS | The class name specified in the AL event report that raised the alert. If the external application acknowledges or clears the alert, it should use this class value in the event report. |
| SP_SEV | Severity of the alert. |
| SP_APPL | Alert application. |
| SP_APPLQUAL | Alert application qualifier. |
| SP_ALERTID **SP_ALARMID | Alert identifier. |
| SP_ALERTQUAL **SP_ALARMQUAL | Alert qualifier. |
| SP_HELP | Value of the HELP attribute for the alert. This could be a file name or actual text. |
| SP_TEXT | Text of the alert, including any newline characters. |
| SP_ACK_TEXT | Acknowledge text of the alert, including any newline characters. If the alert has not been acknowledged, this is set to the null string. |
| SP_EXT_ACTION_LIST | Name of the external action list for the alert. |
| SP_SENDER_DATE | Date (according to the sender) on which the alert was raised. This is set to the null string if the sender has not specified a sender date/time for the alert. |
| SP_SENDER_TIME | Time (according to the sender) at which the alert was raised. This is set to the null string if the sender has not specified a sender date/time for the alert. |
| SP_SERVER_DATE | Date, according to the Operations Sentinel server, on which the alert was raised. |
| SP_SERVER_TIME | Time, according to the server, at which the alert was raised. |
| SP_user-defined | One of these for each user-defined attribute associated with the alert, where user-defined is the name of the attribute in all uppercase with all white space characters removed. |
**These environment variables are retained for compatibility until Operations Sentinel level 12.0. If a Command String or application executable currently refers to one of these environment variables, you should update it to use the new name.