Lab 5. Using Regular Expressions

Modify the schema that you created in Lab 4.
Create a new datatype called imageType and declare
the image element to be of that type.

You are to define a Regular Expression (actually,
several Regular Expressions) for imageType.
When you think that you've figured it out, test it out
using Dan Potter's Regular Expression parser, at:

    http://www.xfront.org/xml-schema/