What type of gateway provides filtering and access control focused on XML data?

The XML Gateway is specifically designed to focus on filtering and access control for XML data. It acts as a dedicated interface that processes XML traffic, providing mechanisms to enforce security policies such as validation of XML structure, content filtering, and routing based on XML data attributes. By targeting XML, it ensures that the data is compliant with security standards and business rules, making it a critical component in environments where XML is extensively used, such as in web services and APIs.

Other types of gateways may handle different protocols or data formats but do not provide the same level of targeted filtering and access control specific to XML data. A document gateway may focus on managing document-based traffic, a message gateway deals with message-based systems, and a data privacy gateway might focus on protecting data in a broader sense without the specialized handling that XML Gateways offer for XML-specific needs. Therefore, the XML Gateway is the correct choice due to its tailored functionality for XML data management.