Converting Restricted XML to Good-Quality JSON

Here's some ideas for converting restricted forms of XML to good-quality JSON. The restrictions are as follows:

• The XML can't contain mixed content (elements with both children/attributes and text).
• The XML cannot depend on the order of child elements with distinct names (order dependence in children with the same name is okay).
• There can't be any attributes with the same name as child elements.
• There can't be any elements or attributes that differ only in their namespace names.

You also need to know the following things for each child element:

• Whether it MUST appear at most once (a singleton element) or MAY appear more than once (a multiplex element).
• Whether it only contains text (an element with simple type) or child elements and/or attributes (an element with complex-type).

Now, to convert the XML to JSON, apply these rules recursively:

• A singleton element of simple type, and likewise an attribute, is converted to a JSON simple value: a number or boolean if syntactically possible, otherwise a string.
• A multiplex object of simple type is converted to a JSON array of simple values.
• A singleton element of complex type is converted to a JSON object that maps the local names of child elements and attributes to their content. Namespace names are discarded.
• A multiplex element of complex type is mapped to a JSON array of JSON objects that map the local names of child elements and attributes to their content. Namespace names are discarded.

Comments are very welcome.