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Why is the class called TransactionEvent instead of Transaction? Is there such a thing as a transaction that cannot be said to have happened? Also, given 'event' has a special meaning in finance, if you are going to call this out, should it not be called TransactionOccurrence?
Recommended Changes
Incorrect subclass relationships.
pas:TransactionEvent is something that does in fact happen, e.g. withdrawing $100 from an ATM. There for it is NOT an OccurrenceKind, which is defined as a " type of event, which has a description". It does in fact have a Date, where OccurrenceKind specifically lacks a Date.
ReFactoring Suggestions
Classes with names that are too general
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