JDOM ensures the document in memory is always well-formed. Can JDOM also ensure the document in memory is always valid?

No, it's our current belief that it's better to expose a checkValid() type of call than to attempt constant validation checking. One reason is performance. A second reason is that you have a chicken-and-egg problem where for example an element needs exactly two child elements to be valid, but after adding either child the document will be in a temporarily invalid state.

To work around this would require something like transactional modifications, and that's a lot of overhead for little gain. More.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.