Which of the following is a function of UDDI registry?
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It is used to add headers to a request
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It defines the semantic behaviour of a web service
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It defines the interface that the web service provides
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It publishes information about a service to a registry
UDDI (Universal Description, Discovery, and Integration) is a standard for web service registries that enables service providers to publish information about their web services. The primary function of a UDDI registry is to serve as a directory where businesses can list their web services, making them discoverable by potential consumers. Option D correctly describes this publishing function. Options A (adding headers), B (defining behavior), and C (defining interface) describe other aspects of web services but not the UDDI registry's core purpose. UDDI is essentially yellow pages for web services - it publishes service location and metadata, not service behavior or interface definition.