Is it possible to write an XML Schema that describes an XML document that lists a set of elements and then requires other elements on that same XML document to use those values as either attributes and/or sub-elements?

Example: define a list of locations, then force location attributes and/or location elements to be of those values.

<root>
  <locations>
    <location>Home</location>
    <location>Office</location>
    <location>School</location>
  </locations>
  <addresses>
    <address location="Home">...</address>
    <address location="Office">...</address>
  </addresses>
</root>

or

<root>
  <locations>
    <location>Home</location>
    <location>Office</location>
    <location>School</location>
  </locations>
  <addresses>
    <address>
      <location>Home</location>
      ...
    </address>
    <address>
      <location>Office</location>
      ...
    </address>
  </addresses>
</root>

I am failing hard at finding the proper way to search for this information. I suspect it is either not possible or I just don't know the right search terms.