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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.

See Property Indexing for more details.

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.