Lab 8. Declaring Attributes

In this directory you will find a version of juicers.xml
which uses attributes.  I have included juicers.dtd to 
show how the attributes were originally declared.
Modify the schema that you created 
in Lab 7 to incorporate these attributes. Validate the
new schema as well as the instance document.

Hints:
[1] You can specify the source of a type as exemplified here:

      <element name="foo">
          <type source="integer">
             ...
          </type>
      </element>

[2] You can specify an attribute to have a fixed value by 
    adding an attribute called fixed to the attribute 
    declaration.