Examples of tests in Silver

Please review and comment. These are some examples I have roughly 
outlined of how testing could work for alternative text with the 
Conformance points and levels. It still needs a lot of discussion and 
details.

https://docs.google.com/document/d/1aBoQ1HDindVnFk_7Ljp-whpK3zAiqAdgJxsgpqsNpgU/edit?usp=sharing

Comments are turned on in Google docs.  However, if you would prefer to 
comment by email, please reply to the list.  We will be discussing this 
in the Tuesday meeting (7 August).

Thanks,

jeanne