What does WSDL stand for?

WSDL stands for Web Services Description Language. It is an XML-based language used for defining the services offered by a web service, including the methods and data formats that the service uses for input and output. WSDL provides a standard way to describe an interface, making it easier for developers to understand how to interact with a web service.

By specifying the details of web services—like their operations, messages, and binding to communication protocols—WSDL enables automated tools to generate client-side code and aids in service discovery. This plays a critical role in facilitating communication and interoperability between different software systems over the internet. The specificity and standardization provided by WSDL are why it is an essential part of web services architecture.

The other options don't accurately capture the definition or the purpose of WSDL. For instance, "Web Service Data Language" and "Web Standards Definition Language" do not reflect the correct terminology or the concept behind WSDL, and "Web Storage Data Language" has no relevance to web services at all.