The specification of xml-to-json() states that whitespace text nodes are ignored. However, this doesn't make sense for text nodes that are children of a <j:string> element, since the text node child of j:string contains the value of the string, which may be whitespace. It should say "whitespace text nodes are ignored, except those whose parent element is an element named 'string'"

Also, for the content of other simple-valued elements (number, boolean) I think it makes sense to strip leading and trailing whitespace, so that an untyped input is accepted if the result of validating it against the schema would be accepted.