docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합
이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영. - Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들 (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거. - Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/ Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/ Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이 존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존). - Dev의 W3Schools 언어 튜토리얼 폴더(Topic_C/CPP/CSS/CSharp/HOWTO/HTML/Java/ JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동. - 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리. - Topic_Programming 최종 문서 수: 2784 → 3985.
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Antigravity Agent
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---
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id: html-basic
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title: "HTML Basic"
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category: "Frontend"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["HTML basics", "basic HTML examples", "HTML fundamentals", "HTML starter", "HTML basic tags"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.89
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created_at: 2026-06-23
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updated_at: 2026-06-23
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review_reason: ""
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merge_history: []
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tags: ["html", "web", "frontend", "w3schools", "basics", "tags"]
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raw_sources: ["https://www.w3schools.com/html/html_basic.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[HTML Basic]]
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## 🎯 한 줄 통찰 (One-line insight)
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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]
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## 🧠 핵심 개념 (Core concepts)
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- **Every HTML document declares its type** — must start with `<!DOCTYPE html>`. [S1]
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- **The HTML document itself** — begins with `<html>` and ends with `</html>`. [S1]
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- **Visible content lives in the body** — the visible part of the document is between `<body>` and `</body>`. [S1]
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- **Headings** — defined with `<h1>` through `<h6>`, where `<h1>` is the most important and `<h6>` the least. [S1]
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- **Paragraphs** — defined with the `<p>` tag. [S1]
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- **Links** — defined with `<a>`; the destination is specified in the `href` attribute. [S1]
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- **Images** — defined with `<img>`, using `src` (path), `alt` (alternate text), `width`, and `height` attributes. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Doctype + html + body skeleton** — the minimal scaffold every page reuses. [S1]
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- **Heading hierarchy** — `<h1>`…`<h6>` express importance, not just size. [S1]
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- **Attribute-carrying elements** — links carry `href`; images carry `src`/`alt`/`width`/`height`. [S1]
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- **Inspect the source** — view a page's HTML with Ctrl+U or right-click → View Page Source / Inspect. [S1]
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## 📖 세부 내용 (Details)
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**HTML Documents**
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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]
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```html
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<!DOCTYPE html>
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<html>
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<body>
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<h1>My First Heading</h1>
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<p>My first paragraph.</p>
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</body>
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</html>
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```
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**HTML Headings**
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HTML headings are defined with the `<h1>` to `<h6>` tags. `<h1>` defines the most important heading; `<h6>` defines the least important heading. [S1]
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```html
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<h1>This is heading 1</h1>
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<h2>This is heading 2</h2>
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<h3>This is heading 3</h3>
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```
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**HTML Paragraphs**
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HTML paragraphs are defined with the `<p>` tag. [S1]
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```html
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<p>This is a paragraph.</p>
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<p>This is another paragraph.</p>
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```
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**HTML Links**
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HTML links are defined with the `<a>` tag. The link's destination is specified in the `href` attribute. [S1]
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```html
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<a href="https://www.w3schools.com">This is a link</a>
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```
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**HTML Images**
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HTML images are defined with the `<img>` tag. The source file (`src`), alternative text (`alt`), `width`, and `height` are provided as attributes. [S1]
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```html
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<img src="w3schools.jpg" alt="W3Schools.com" width="104" height="142">
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```
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**How to View HTML Source**
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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]
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## 🛠️ 적용 사례 (Applied in summary)
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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.
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## 💻 코드 패턴 (Code patterns)
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Basic HTML document (HTML):
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```html
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<!DOCTYPE html>
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<html>
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<body>
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<h1>My First Heading</h1>
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<p>My first paragraph.</p>
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</body>
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</html>
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```
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A link:
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```html
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<a href="https://www.w3schools.com">This is a link</a>
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```
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An image:
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```html
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<img src="w3schools.jpg" alt="W3Schools.com" width="104" height="142">
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```
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source.
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.89
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[HTML Tutorial]]
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- **관련 개념:** [[HTML Introduction]], [[HTML Elements]], [[HTML Headings]], [[HTML Paragraphs]], [[HTML Attributes]]
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- **참조 맥락:** The quick-start overview referenced when introducing the core tags before studying each in depth.
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## 📚 출처 (Sources)
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- [S1] W3Schools — HTML Basic — https://www.w3schools.com/html/html_basic.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "HTML Basic" page (Astra wiki-curation, P-Reinforce v3.1 format).
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