Introduction
The RTB Project is an API specification for companies needing an open protocol for the automated trading of digital media across a broader range of platforms, devices, and advertising solutions. To aid those wishing to enhance the capture of device data, we've compiled a guide to map OpenRTB Object: Device fields to 51Degrees properties and values. The full Open RTB API Specification can be found here with the Device Object specification on page 23.
OpenRTB API Mappings
The following table lists the OpenRTB (3.2.18 Object: Device) field names, supported 51Degrees properties that contain equivalent data, alongside notes that may be helpful when mapping OpenRTB and 51Degrees values.
| OpenRTB property | OpenRTB Description | 51Degrees property | 51Degrees Comments |
| ua | Browser user agent string. | User-Agent field from HTTP header. | The User-Agent string can be used to identify the device, application, operating system, software vendor or software version of the requesting device. |
| devicetype | The general type of device. Refer to List 5.21. | DeviceType | Indicates the type of the device based on values set in other properties, such as IsMobile, IsTablet, IsSmartphone, IsSmallScreen etc. See [OpenRTB Device Type Mappings](DeviceDetection_MigrationGuides_OpenRTBMappings_DeviceType) table below. |
| make | Device make (e.g., “Apple”) | HardwareVendor | Indicates the name of the company that manufactures the device or primarily sells it, e.g. Samsung. List of Manufactures. |
| model | Device model (e.g., “iPhone”) | HardwareModel | Indicates the model name or number used primarily by the hardware vendor to identify the device, e.g.SM-T805S. When a model identifier is not available the HardwareName will be used. List of Models. |
| os | Device operating system (e.g., “iOS”) | PlatformName | Indicates the name of the operating system the device is using. List of Operating Systems. |
| osv | Device operating system version (e.g., “3.1.2”). | PlatformVersion | Indicates the version or subversion of the software platform. |
| hwv | Hardware version of the device (e.g., “5S” for iPhone 5S). | This information is contained within the HardwareModel property (OpenRTB:model). | |
| h | Physical height of the screen in pixels | ScreenPixelsHeight | Indicates the height of the device's screen in pixels. This property is not applicable for a device that does not have a screen. For devices such as tablets or TV which are predominantly used in landscape mode, the pixel height will be the smaller value compared to the pixel width. |
| w | Physical width of the screen in pixels | ScreenPixelsWidth | Indicates the width of the device's screen in pixels. This property is not applicable for a device that does not have a screen. For devices such as tablets or TV which are predominantly used in landscape mode, the pixel width will be the larger value compared to the pixel height. |
| ppi | Screen size as pixels per linear inch. | ((ScreenPixelsWidth / ScreenInchesWidth) + (ScreenPixelsHeight / ScreenInchesHeight)) / 2 | Screen size as pixels per linear inch computed from screen dimensions in pixels and inches. |
| js | Support for JavaScript, where 0 = no, 1 = yes. | Javascript | Indicates if the browser supports JavaScript. |
OpenRTB Device Type Mappings
This table shows the mappings between OpenRTB Device Types (5.21) and 51Degrees DeviceType Values.
| OpenRTB Value | OpenRTB Description | 51Degrees Value |
| 1 | Mobile/Tablet | Mobile |
| 2 | Personal Computer | Desktop |
| 3 | Connected TV | Tv |
| 4 | Phone | SmartPhone, SmallScreen |
| 5 | Tablet | Tablet |
| 6 | Connected Device | Console, EReader, SmartWatch |
| 7 | Set Top Box | MediaHub |
Unsupported OpenRTB API Mappings
Currently, the following fields are not directly supported by 51Degrees. Unless stated otherwise, this is because the value is unique to an individual device.
| OpenRTB property | OpenRTB Description | Source | 51Degrees Comments |
| geo | Location of the device assumed to be the user’s current location defined by a Geo object (Section 3.2.19). | Contact Us | |
| dnt | Standard “Do Not Track” flag as set in the header by the browser, where 0 = tracking is unrestricted, 1 = do not track | This data is not captured as it is unique to a device. | |
| lmt | “Limit Ad Tracking” signal commercially endorsed (e.g., iOS, Android), where 0 = tracking is unrestricted, 1 = tracking must be limited per commercial guidelines. | This data is not captured as it is unique to a device. | |
| ip | IPv4 address closest to device. | From HTTP requests. | Contact Us |
| ipv6 | IP address closest to device as IPv6. | From HTTP requests. | This data is not captured as IPv6 adoption is not universal enough to justify. |
| pxratio | The ratio of physical pixels to device independent pixels. | Contact Us | |
| geofetch | Indicates if the geolocation API will be available to JavaScript code running in the banner, where 0 = no, 1 = yes. | This data is not captured as it is unique to a device. | |
| flashver | Version of Flash supported by the browser. | Not mapped as legacy property. | |
| language | Browser language using ISO-639-1-alpha-2. | Accept-Language field from HTTP header. | This data is not captured as it is unique to a device. |
| carrier | Carrier or ISP (e.g., “VERIZON”) using exchange curated string names which should be published to bidders a priori. | Contact Us | |
| mccmnc | Mobile carrier as the concatenated MCC-MNC code (e.g., “310-005” identifies Verizon Wireless CDMA in the USA). | Contact Us | |
| connectiontype | Network connection type. Refer to List 5.22. | Contact Us | |
| ifa | ID sanctioned for advertiser use in the clear (i.e., not hashed). | ||
| didsha1 | Hardware device ID (e.g., IMEI); hashed via SHA1. | ||
| didmd5 | Hardware device ID (e.g., IMEI); hashed via MD5. | ||
| dpidsha1 | Platform device ID (e.g., Android ID); hashed via SHA1. | ||
| dpidmd5 | Platform device ID (e.g., Android ID); hashed via MD5. | ||
| macsha1 | MAC address of the device; hashed via SHA1. | ||
| macmd5 | MAC address of the device; hashed via MD5. | ||
| ext | Placeholder for exchange-specific extensions to OpenRTB. | n/a | |
OpenRTB Property Values
Below are several lists of values for use with OpenRTB, they are all open source Creative Commons licensed.
- Hardware Vendors - A list of popular consumer electronic manufactures who sell connected devices.
- Hardware Models - A list of popular consumer electronic model codes.
- Platform Names - A list of popular operating system names.