Editing Web 2.0 (section)

===Web APIs===
{{Main|Web API}}
Web 2.0 often uses machine-based interactions such as [[Representational State Transfer|REST]] and [[SOAP]]. Servers often expose proprietary [[Application programming interface]]s (APIs), but standard APIs (for example, for posting to a blog or notifying a blog update) have also come into use. Most communications through APIs involve [[XML]] or [[JSON]] payloads. REST APIs, through their use of self-descriptive messages and [[HATEOAS|hypermedia as the engine of application state]], should be self-describing once an entry [[Uniform Resource Identifier|URI]] is known. [[Web Services Description Language]] (WSDL) is the standard way of publishing a SOAP Application programming interface and there are [[List of web service specifications|a range of Web service specifications]].