XML·XML from well-formed documents to XSLT

SOAP and WSDL

Understand the envelope, the contract and when SOAP is still required.

Beginner 13 min read Lesson 9 of 300 Challenge included

What you will be able to do

The Envelope is the mandatory root.
WSDL describes the service contract.
SOAP faults are structured errors.
Prefer REST for new public APIs unless a contract requires SOAP.

In plain English

SOAP wraps messages in an Envelope with an optional Header and a Body. A WSDL document describes the operations, messages and endpoint. SOAP still appears in banking, government and enterprise integrations where a formal contract is required.

request.xmlHTML

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <GetCourse xmlns="https://example.com/courses">
      <slug>css</slug>
    </GetCourse>
  </soap:Body>
</soap:Envelope>

Your turn

Add a SOAP body

Medium

Wrap a GetCourse element in a SOAP Body.

HTML · starter

<soap:Envelope>

Check your understanding before moving on.

Knowledge checkQuestion 1

Which element is mandatory in every SOAP message?

Select an answer to continue

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