| AffiliationInfo | Is used to the indicate the specific affiliation information being requested. |
| AreaInfo | Is used to the indicate the specific area information being requested. |
| ContactInfo | Is used to the indicate whether contact information is being requested. |
| ContentInfos | Container for specific information. |
| FacilityInfo | Is used to the indicate the specific facility information being requested. |
| HotelInfo | Is used to indicate whether hotel information is being requested. |
| MultimediaObjects | Is used to the indicate whether multimedia information is being requested. |
| Policies | Is used to the indicate whether policy information is being requested. |
| 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. |
| ApplicableDate | Date to which the response information should apply. |
| BrandCodeList | These may be used to filter the response of requested data. |
| CountryCodeList | These may be used to filter the response of requested data.List of country codes in ISO 3166 format. |
| MoreDataEchoToken | The response returns the attribute if there was additional data. The text value should be echoed in this request to indicate where to begin the next block of data. |
| StateCodeList | One or more postal service standard codes or abbreviations for the state, province, or region. |
| AreaID | An identifier of an area as defined by a hotel reservation system. |
| BrandCode | A code that identifies the brand or flag of a hotel, often used for independently-owned or franchised properties who are known by a specific brand. |
| BrandName | The name of a brand of hotels (e.g., Courtyard, Hampton Inn). |
| ChainCode | The code that identifies a hotel chain or management group. The hotel chain code is decided between vendors. This attribute is optional if the hotel is an independent property that can be identified by the HotelCode attribute. |
| ChainName | The name of the hotel chain (e.g., Hilton, Marriott, Hyatt, Starwood). |
| HotelCityCode | The IATA city code; for example DCA, ORD. |
| HotelCode | The code that uniquely identifies a single hotel property. The hotel code is decided between vendors. |
| HotelCodeContext | A text field used to communicate the context (or source of - ex Sabre, Galileo, Worldspan, Amadeus) the HotelReferenceGroup codes. |
| HotelName | A text field used to communicate the proper name of the hotel. |
| TTIcode | TTI hotel reference code. |