AVC schema

[tf-rstokoe]

Add and develop the AVC schema

[tf-rstokoe]

Additional changes

• Merge reference data into common
• Add a type to the breed attribute
• Add the list of production types to that attribute
• Change the type of the version attribute from a float to something more-suitable
• Add constraining facets to zip code
• Constrain age to be nonnegative
• Change test result (positive/negative/suspect/other) representation
• Extract TestCodeType for consistency?

Additional Tasks

• Publish schema documentation on coreone.info