| Contact | The primary contact.Name of an individual and appropriate contact information. May be contact information for the customer or someone affiliated with the customer. |
| QualifierInfo | A specific type of age and/or group qualifier, such as "Adult". Select a value from the pre-defined list or select "Other_" and enter a value known between trading partners in the @Extension attribute. |
| TPA_Extensions | A placeholder in the schema to allow for additional elements and attributes to be included per Trading Partner Agreement (TPA).Allows extensions to be added to the OpenTravel specification per trading partner agreement. |