How do I rename an attribute using XSLT?

Question

I have an xml like this:

I want to transform it to

Answer 1

This is very simple: Use the identity transform and create a template that transforms the name attribute:

This will leave everything in the document except for name attributes exactly as it is. If you only want to change the name attribute on person elements, put a more restrictive XPath in the template's match attribute, e.g. person/@name.