Semantic structure · Lesson 3 of 10 · 7 minutes

Semantic structure: Main landmark

The main landmark contains the page-specific content, excluding repeated site navigation.

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Your objectives

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1
Build main landmark
Build this first target: <header>; <p> inside <header> containing “Study group”. Inspect the structure before checking the lesson.
Hint & worked example
The main landmark contains the page-specific content, excluding repeated site navigation.
The requested elements, attributes, content, and hierarchy exist outside comments.
```
<header><p>Study group</p></header>
```
Common mistake to avoid: A visual appearance alone guarantees the intended HTML meaning.
2
Extend the main landmark example
Extend your file to include: <header>; <p> inside <header> containing “Study group”; <main>; <h1> inside <main> containing “This week”. Inspect the structure before checking the lesson.
Hint & worked example
The main landmark contains the page-specific content, excluding repeated site navigation.
The requested elements, attributes, content, and hierarchy exist outside comments.
```
<header><p>Study group</p></header>
<main><h1>This week</h1></main>
```
Common mistake to avoid: Replacing semantic elements with generic divs automatically improves accessibility.
3
Verify the complete main landmark pattern
Finish the pattern with: <header>; <p> inside <header> containing “Study group”; <main>; <h1> inside <main> containing “This week”; <p> inside <main> containing “Practice reading service logs.”. Inspect the structure before checking the lesson.
Hint & worked example
The main landmark contains the page-specific content, excluding repeated site navigation.
The requested elements, attributes, content, and hierarchy exist outside comments.
```
<header><p>Study group</p></header>
<main><h1>This week</h1><p>Practice reading service logs.</p></main>
```
Common mistake to avoid: A visual appearance alone guarantees the intended HTML meaning.

Understand the pattern

The main landmark contains the page-specific content, excluding repeated site navigation.

Misconceptions to reject

A visual appearance alone guarantees the intended HTML meaning.
Replacing semantic elements with generic divs automatically improves accessibility.

The preview is a sanitized subset, not a full browser compatibility test.

Worked example and expected result

<header><p>Study group</p></header>
<main><h1>This week</h1><p>Practice reading service logs.</p></main>

The main landmark contains the page-specific content, excluding repeated site navigation.

Try a variation

Adapt the final example to a different project name while retaining its structure and relationships. A different context still needs a real browser and accessibility check.

Explain it

Which statement correctly explains main landmark?A visual appearance alone guarantees the intended HTML meaning.Replacing semantic elements with generic divs automatically improves accessibility.The main landmark contains the page-specific content, excluding repeated site navigation.

Apply it elsewhere

You reuse main landmark in a different project. What must still be verified?Only whether the source code has the same number of lines.The meaning, relationships, and accessible names in the new document.Nothing; passing a single exercise guarantees every future use.

Keep the momentum.

Complete the lab, then explain and apply the pattern.

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MDN: HTML structure