SOAP services use which technology to format information?

SATA (Serial ATA) is a hardware interface standard for connecting storage devices and has no relevance to web service message formatting.

PCI (Peripheral Component Interconnect) is a computer bus standard for hardware expansion cards and is unrelated to data formatting in web services.

SOAP is a protocol for exchanging structured information in web services and requires XML for all message envelopes, headers, and body elements. Every SOAP message is an XML document conforming to a defined schema, enabling platform-independent communication. This XML-based structure distinguishes SOAP from lighter protocols like REST, which can use JSON or other formats.

ISDN (Integrated Services Digital Network) is a digital telephone network technology and plays no role in formatting SOAP service messages.