The opening paragraph of 2.7 should be updated with this rewritten text.

Since the inception of the CAP standard, event term usage in the <event> element in CAP based systems around the world has evolved to be wide ranging and varied. Alerting authorities, and their CAP originators, have fallen to a number of differing practices that makes comparisons of the <event> element values extremely difficult. The list below is not a complete list of these practices but does demonstrate various interpretations and aspects of the larger problem of assigning an event term in CAP.