SOAP (Simple Object Access Protocol) is a messaging protocol for exchanging structured information across networks, commonly encoded in XML. Like any web API approach, it needs clear rules and formats so parties can exchange data unambiguously. section 1.1.4
When choosing an approach for a web API, compare SOAP with REST, RPC, and GraphQL. They differ in characteristics, trade-offs, and supported data formats. This overview does not provide steps for implementing SOAP. section 1.1.4
