Creating schema with restrictions

[tiredofit]

According to this page:

https://www.excel-easy.com/examples/xml.html

if I want to create a schema consisting of four attributes, LastName, Sales, Country and Quarter, I can do it like this:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<data-set xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <record>
       <LastName>Smith</LastName>
       <Sales>16753</Sales>
       <Country>UK</Country>
       <Quarter>Qtr 3</Quarter>
    </record>
    <record>
       <LastName>Johnson</LastName>
       <Sales>14808</Sales>
       <Country>USA</Country>
       <Quarter>Qtr 4</Quarter>
    </record>
</data-set>

According to this webpage,

https://www.w3schools.com/xml/schema_facets.asp

if I want to add restrictions, it can be done like so:

<xs:element name="age">
  <xs:simpleType>
    <xs:restriction base="xs:integer">
      <xs:minInclusive value="0"/>
      <xs:maxInclusive value="120"/>
    </xs:restriction>
  </xs:simpleType>
</xs:element>

so if I want to create a schema with four attributes, LastName, Sales, Country and Quarter with restrictions, how would that be done?

Thanks