Lab 12. Using an Inherited Attribute

Open holiday.xml and examine it. It contains a list of
countries that I visited on a recent holiday.

Notice that on the root element is the attribute, xml:lang.

Open countries.xsd and examine it. It contains a simpleType
which lists (enumerates) all the countries, in English.

Open holiday.xsd and examine it. You are to modify it
so that:

   if xml:lang = 'en' then
      the value of <country-visited> must come from countries.xsd
   else
      the value of <country-visited> can be any string