This is the Complete Object Reference. For specific objects, check the grouped version:

• Global variables - These variables are related to the knowledge base itself. Some of them are template related or account related. See more at Shopify/Liquid Global Objects‍;
• Category variables - These variables are related to the category object. See more at Shopify/Liquid Category Objects‍;
• Question variables - These variables are related to the question object. See more at Shopify/Liquid Question Objects‍;

Global Objects:

Category Objects:

Question Objects: