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Web services can be extended with versioning capabilities through the use of WebDAV (Web Distributed Authoring and Versioning). WebDAV is an extension of the HTTP protocol that allows users to collaboratively edit and manage files on remote web servers. It facilitates version control by enabling the manipulation of resources through various methods, including locking, moving, and versioned collections of resources.

WebDAV inherently provides capabilities that support versioning, such as managing revisions of documents and enabling multiple users to work on resources without overwriting each other’s changes. This is particularly useful in web services where resource management and the ability to track changes over time are important for maintaining data integrity and collaboration.

While JSON, HTTP, and XML are all important technologies in web services, they do not inherently provide versioning capabilities. JSON is a data interchange format, HTTP is the foundational protocol for web communications, and XML is another markup language used for data representation. None of these are specifically designed to extend services with versioning like WebDAV does.