Note: You are viewing the development version of Schema.org. See how we work for more details.

additionalType

A Schema.org Property
Usage: 100K - 1M Domains Based on monthly aggregations from Google's web index. (Google - August 2026)
Thing > Property :: additionalType
An additional type for the item, typically used for adding more specific types from external vocabularies in microdata syntax. This is a relationship between something and a class that the thing is in. Typically the value is a URI-identified RDF class, and in this case corresponds to the use of rdf:type in RDF. Text values can be used sparingly, for cases where useful information can be added without their being an appropriate schema to reference. In the case of text values, the class label should follow the schema.org style guide.

Subproperty of:

Values expected to be one of these types

Used on these types

Examples

Example 1
Copied
No Markup Microdata RDFa JSON-LD Structure
Example notes or example HTML without markup.


 

   
Le concerto

   

       Bibliographic Details
       

         

           Main Author: 
           Ferchault, Guy
         

       

   

 


 

     Holdings details from Anytown City Library
     

       
       

         Copy 
         Available
           
Barcode: CONC91000937

           
Call number: 780 R2

           
Library: Anytown City Library

         		
       

     

    
    
    
    
    
Example encoded as Microdata embedded in HTML.

    
 

 

   
   
Le concerto

   

       Bibliographic Details
       

 

  
  
  
  

         

           Main Author:
Holdings details from Anytown City Library
Copy Available
Barcode: CONC91000937
Call number: 780 R2
Library: Anytown City Library
Example encoded as RDFa embedded in HTML.
 


    

        Le concerto
    

    

        Bibliographic Details
        

            

                
                    Main Author:
                
                
                    Ferchault, Guy
                
            

        

    





    Holdings details from Anytown City Library
    

        
        

            
                Copy
            
            
                Available
                

                    Barcode: CONC91000937
                

                

                    Call number: 780 R2
                

                

                    Library: Anytown City Library
Example encoded as JSON-LD in a HTML script tag.
Structured representation of the JSON-LD example.