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koriweb 9609c04755 docs(10_Wiki): W3Schools 위키화 — HTML/CSS/JavaScript(core)

W3Schools 튜토리얼을 P-Reinforce v3.1 포맷으로 위키화(영어 본문, 한/영 섹션 헤더).
- Topic_HTML: 59문서 (튜토리얼+예제, 레퍼런스/메타 제외)
- Topic_CSS: 190문서 (메인 + Advanced/Flexbox/Grid/RWD 전체)
- Topic_JavaScript: 120문서 (코어 언어; Temporal/DOM상세/BOM/WebAPI/AJAX/jQuery/Graphics 등은 후속)
각 폴더 00_INDEX.md(MOC) 포함. 코드 verbatim, 미확인분은 "Not found in source" 표기.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-06-23 19:21:18 +09:00

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title

HTML Basic

🎯 한 줄 통찰 (One-line insight)

A handful of basic HTML examples — document structure, headings, paragraphs, links, and images — are enough to build a first web page; don't worry if the tags aren't fully understood yet. [S1]

🧠 핵심 개념 (Core concepts)

Every HTML document declares its type — must start with <!DOCTYPE html>. [S1]
The HTML document itself — begins with <html> and ends with </html>. [S1]
Visible content lives in the body — the visible part of the document is between <body> and </body>. [S1]
Headings — defined with <h1> through <h6>, where <h1> is the most important and <h6> the least. [S1]
Paragraphs — defined with the <p> tag. [S1]
Links — defined with <a>; the destination is specified in the href attribute. [S1]
Images — defined with <img>, using src (path), alt (alternate text), width, and height attributes. [S1]

🧩 추출된 패턴 (Extracted patterns)

Doctype + html + body skeleton — the minimal scaffold every page reuses. [S1]
Heading hierarchy — <h1>…<h6> express importance, not just size. [S1]
Attribute-carrying elements — links carry href; images carry src/alt/width/height. [S1]
Inspect the source — view a page's HTML with Ctrl+U or right-click → View Page Source / Inspect. [S1]

📖 세부 내용 (Details)

HTML Documents All HTML documents must start with a document type declaration: <!DOCTYPE html>. The HTML document itself begins with <html> and ends with </html>. The visible part of the HTML document is between <body> and </body>. [S1]

<!DOCTYPE html>
<html>
<body>

<h1>My First Heading</h1>
<p>My first paragraph.</p>

</body>
</html>

HTML Headings HTML headings are defined with the <h1> to <h6> tags. <h1> defines the most important heading; <h6> defines the least important heading. [S1]

<h1>This is heading 1</h1>
<h2>This is heading 2</h2>
<h3>This is heading 3</h3>

HTML Paragraphs HTML paragraphs are defined with the <p> tag. [S1]

<p>This is a paragraph.</p>
<p>This is another paragraph.</p>

HTML Links HTML links are defined with the <a> tag. The link's destination is specified in the href attribute. [S1]

<a href="https://www.w3schools.com">This is a link</a>

HTML Images HTML images are defined with the <img> tag. The source file (src), alternative text (alt), width, and height are provided as attributes. [S1]

<img src="w3schools.jpg" alt="W3Schools.com" width="104" height="142">

How to View HTML Source You can view the HTML source of a page. By pressing Ctrl + U in a browser, or right-clicking on the page and selecting "View Page Source," you can see the HTML. You can also right-click an element and choose "Inspect" to see what elements are made up of. [S1]

🛠️ 적용 사례 (Applied in summary)

The document skeleton and the heading/paragraph/link/image snippets above are the basic building blocks reused on virtually every page. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Basic HTML document (HTML):

<!DOCTYPE html>
<html>
<body>

<h1>My First Heading</h1>
<p>My first paragraph.</p>

</body>
</html>

A link:

<a href="https://www.w3schools.com">This is a link</a>

An image:

<img src="w3schools.jpg" alt="W3Schools.com" width="104" height="142">

⚖️ 모순 및 업데이트 (Contradictions & updates)

No contradictions found in the source.

✅ 검증 상태 및 신뢰도

상태: draft
검증 단계: conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
신뢰 점수: 0.89
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: HTML Tutorial
관련 개념: HTML Introduction, HTML Elements, HTML Headings, HTML Paragraphs, HTML Attributes
참조 맥락: The quick-start overview referenced when introducing the core tags before studying each in depth.

📚 출처 (Sources)

[S1] W3Schools — HTML Basic — https://www.w3schools.com/html/html_basic.asp

📝 변경 이력 (Change history)

2026-06-23: Initial draft synthesized from the W3Schools "HTML Basic" page (Astra wiki-curation, P-Reinforce v3.1 format).

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