| network | required | Specific identifier provided by RAS | '4178463' | string | 
    
      | site | required | Specific identifier name (case-insensitive) that is associated with this ad unit and provided by RAS | 'example_com' | string | 
    
      | area | required | Ad unit category name; only case-insensitive alphanumeric with underscores and hyphens are allowed | 'sport' | string | 
    
      | slot | required | Ad unit placement name (case-insensitive) provided by RAS | 'slot' | string | 
    
      | pageContext | optional | Web page context data | {} | object | 
    
      | pageContext.dr | optional | Document referrer URL address | 'https://example.com/' | string | 
    
      | pageContext.du | optional | Document URL address | 'https://example.com/sport/football/article.html?id=932016a5-02fc-4d5c-b643-fafc2f270f06' | string | 
    
      | pageContext.dv | optional | Document virtual address as slash-separated path that may consist of any number of parts (case-insensitive alphanumeric with underscores and hyphens); first part should be the same as sitevalue and second asareavalue; next parts may reflect website navigation | 'example_com/sport/football' | string | 
    
      | pageContext.keyWords | optional | List of keywords associated with this ad unit; only case-insensitive alphanumeric with underscores and hyphens are allowed | ['euro', 'lewandowski'] | string[] | 
    
      | pageContext.keyValues | optional | Key-values associated with this ad unit (case-insensitive); following characters are not allowed in the values: " ' = ! + # * ~ ; ^ ( ) < > ] [ & @ | {} | object | 
    
      | pageContext.keyValues.ci | optional | Content unique identifier | '932016a5-02fc-4d5c-b643-fafc2f270f06' | object | 
    
      | pageContext.keyValues.adunit | optional | Ad unit name | 'example_com/sport' | string |