I expect that all of the "ch" elements in this tag will be put into an array. But what i really expect is that the XML doesn't come with such a stupid and confusing design in the first place. I can't see a semantic reason for this type of XML design. If someone sends me a design like this and does not have a very, very, very good explanation and a very solid reason behind this, i will just refuse to accept that design.

Just because something is possible does not mean it is acceptable. Like using obfuscation in production code.