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.
perl -e 'use Crypt::Digest::SHA256 qw[sha256_hex]; print substr(sha256_hex("the Answer To Life, The Universe And Everything"), 6, 2), "\n";'