XML·XML from well-formed documents to XSLT

Well-formedness

Close tags, escape characters and use CDATA deliberately.

Beginner 12 min read Lesson 2 of 300 Challenge included

What you will be able to do

Escape & < > with entities.
Use CDATA for blocks of unescaped text.
Attribute values need quotes.
Well-formed is not the same as valid.

In plain English

A document is well-formed when it follows XML syntax: tags close, attributes quote and special characters are escaped. Validity is a separate, stronger claim defined by a schema.

wellformed.xmlHTML

<note>
  <text>A &lt; B &amp; C</text>
  <code><![CDATA[if (a < b) { run(); }]]></code>
</note>

Your turn

Escape an ampersand

Easy

Write the escaped form of the text A & B.

HTML · starter

A & B

Check your understanding before moving on.

Knowledge checkQuestion 1

What does CDATA do?

Select an answer to continue

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Lesson 2 of 300 · 0% of course