| AcceptedPayments | Provides the ability to search for hotel(s) based on whether they accept specific form(s) of payment.Used to define the types of payments accepted. |
| AdditionalContents | A collection of Additional Content elements. |
| Address | Uses any part of address information, such as street name, postal code, or country code. |
 Award | An element that identifies the hotel ratings. |
| CodeRef | Indicates the location of points of interest. |
| HotelAmenity | Hotel level amenities for searches. |
| HotelFeature | Used to search for hotels based on hotel features. |
| HotelMeetingFacility | Used to search for hotels based on meeting facility requirements. |
| HotelRef | Indicates the detail of hotel reference information. |
| MapArea | Provides coordinates used to define the area of a map. |
| MealPlan | Used to search for hotels that offer types of meal plan, such as "all-inclusive". This matches against the static property content, not the meal included in the rate. |
| Media | Used to search for hotels based on available media content. |
| Position | The Position element contains three attributes, Latitude, Longitude, and Altitude, used to indicate the geographic location(s) requested by the search, expressed in notation specified by ISO standard 6709. It is likely that only the first two attributes, Latitude and Longitude, would be needed to define a geographic area. |
| Profiles | A collection of profile objects or unique IDs of profiles.A collection of Profile objects or Unique IDs of Profiles. |
| Radius | Used to specify the extent of a search area. The extent is relative to an element (position, address, hotel reference, etc.) present in this ItemSearchCriterionType that specifies a location. |
| RatePlanCandidates | Collection of requested rate plans. |
| RateRange | Requested rate or rate range. Repeats to allow the identification of multiple ranges for multiple room stay candidates. |
| RebatePrograms | Collection of rebate programs the hotel participates in. |
| Recreation | Identifies recreation facilities or amenities of interest. |
| RefPoint | The Reference Point element allows for a search by proximity to a designated reference point by name. |
| RoomAmenity | Room level amenities for searches.Indicates preferences for hotel room amenities. |
| RoomStayCandidates | Collection of room stay candidates. |
| Service | Identifies business services of interest. |
| StayDateRange | Range of dates, or fixed set of dates for Availability Request. Date range can also be specified by using start dates and number of nights (minimum, maximum or fixed).Used to specify a time window range by either specifying an earliest and latest date for the start date and end date or by giving a date with a time period that can be applied before and/or after the start date. |
| Telephone | Telephone number(s) used in the search. |
| 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. |
| Transportation | Identifies transportation facilities. |
| UserGeneratedContent | Information linked to user content. |
| AddressSearchScope | If "Primary", the address search keyword(s) will be compared to the physical address of the property. If "Alternate", the 'city' area attractions associated with the property will be searched. |
| AlternateAvailability | Identifies under what circumstances alternate availability should be returned. |
| ExactMatch | Values of "true" or "false", indicating whether the string of the search value must be an exact match. |
| ImportanceType | An enumerated list, indicating the level of importance of the search criterion. Acceptable values are "Mandatory", "High", "Medium", or "Low." |
| InfoSource | Used to specify the source of the data being exchanged as determined by trading partners.Used to specify the source of the data being exchanged. |
| MoreDataEchoToken | The search response returns this attribute if there were additional items that could not fit within the response. The text value returned should be echoed in the subsequent request to indicate where to begin the next block of data. |
| Ranking | Defines a ranking scale expressed as integers; meaning and scale are based on individual implementations. |