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51Degrees API Documentation 4.5

What's New in Version 4.5 of Device Detection

Performance

Optimized processing of User-Agent Client Hints, reducing lookup time.

Graph Selection

Removed usePerformanceGraph and usePredictiveGraph configuration options.

Detection now uses a single, unified predictive graph.

Property Retrieval

Added propertyValueIndex configuration option.

When true, property values are indexed at startup for faster retrieval.

New Evidence Keys

Added support for alternative representations of User-Agent Client Hints via the following evidence keys (usable with query. and cookie. prefixes):
- 51D_GetHighEntropyValues: Base64-encoded JSON string from JSON.stringify() of the getHighEntropyValues() JavaScript call.
- 51D_StructuredUserAgent: Plain JSON string using the device.sua structure as defined in OpenRTB 2.6.
These keys are functionally equivalent to passing the following HTTP headers:
- Sec-CH-UA
- Sec-CH-UA-Mobile
- Sec-CH-UA-Platform
- Sec-CH-UA-Model
- Sec-CH-UA-Full-Version-List
- Sec-CH-UA-Platform-Version
The conversion happens natively in the device detection engine, eliminating the need for additional pipeline elements. See the UA-CH JavaScript page for detailed usage information.

Results Serialization

Introduced ResultsHashSerializer service class.

Enables retrieval of all detected property values as a single JSON-serialized string.

Previously, properties could only be accessed individually by key.