About XHTML Validation
Writing code that looks like XHTML and writing code that will validate
as true XHTML are two very different things. Thus far you have completed
exercises that work correctly in your browser and appear to be XHTML, but
to be truly correct, your code needs to validated.
There are two steps to validating XHTML code. First we will look at coding
requirements of XHTML that if not followed will make your code fail validation,
then we will learn where to test your code for validation errors.
