It's amazingly difficult to find clear information anywhere. For instance, CDC Nutrition guidelines?! It's an example of something that, in trying to be comprehensive, results in a mess of awkwardly qualified terms and difficult to digest (couldn't help it) high-level recommendation.
USDA Food Patterns, Healthy US-Style Eating Pattern. https://health.gov/dietaryguidelines/2015/guidelines/appendi...
Meat poultry and eggs in the same line? They are completely different foods with wildly varying nutrients.
[UPDATED: good start] - Pictorial Nutrition Guidelines: http://www.fremont.k12.ca.us/cms/lib04/CA01000848/Centricity...
- Comparison of International Dietary Guidelines and Food Guides in Twelve Countries across Stages of the Nutrition Transition http://www.fasebj.org/content/29/1_Supplement/898.36.short