| 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. |
| CacheEndDateTime | The ending date/time for the cache results to be returned. This is used in conjunction with the cacheStartDate to constrain the date range of the results. |
| CacheStartDateTime | The starting date/time for the cache results to be returned. |
| ChainCode | The code that identifies a hotel chain or management group. The hotel chain code is decided between vendors. |
| HotelCode | The code that uniquely identifies a single hotel property. The hotel code is decided between vendors. |
| InvBlockCode | A code or identification number that identifies the room stay as part of a group, package tour, or block of rooms designated in the inventory. |
| RoomTypeCode | Specific system room type code, ex: A1K, A1Q etc. |
| PromotionCode | Promotion code is the identifier used by the host to link directly with a specific named advertising campaign. By including the required code, the client is able to gain access to special offers which may have been created for a specifically targeted group via a CRM system or for a wider advertising campaign using Television or press adverts. |
| PromotionVendorCode | List of the vendor codes associated with a promotion. |
| RatePlanCategory | Hotel systems often group multiple rate plans into a single category. This refers to that category that is specific to the hotel CRS/ PMS and should not be confused with a GDS rate category. |
| RatePlanCode | A string value may be used to request a particular code or an ID if the guest qualifies for a specific rate, such as AARP, AAA, a corporate rate, etc., or to specify a negotiated code as a result of a negotiated rate. |
| RatePlanID | A text field used to indicate a special ID code that is associated with the rate and is essential in the reservation request in order to obtain the rate. Examples are Corporate ID. |
| RatePlanQualifier | The Rate Plan Qualifier is used to control the sort order of RatePlans. Those Rate Plans that are not qualified will appear first, those that are qualified will appear last. |
| RatePlanType | An enumerated type that allows the query to specify a rate category type, and provides major categories for comparison across brands. Refer to OpenTravel Code List Rate Plan Type (RPT). |