refactor(topics): 멀티 에이전트용 지식 재편 — _Common(공통 기본기) + Domain_* 구조
에이전트 8종(대화형/프로그래머 C·S/디자이너/설계자/기획자/QA/PD/PM)에게 [공통 기본 능력 + 롤별 Specialty] 2층으로 지식을 주입하기 위한 재분류. 문서 내용·포맷은 무수정, 폴더 이동만 (6,372개 문서 수 보존 확인). - Topic_Programming → Domain_Programming (내부 구조 보존) - Topic_Graphic → Domain_Design - Topic_Business → Domain_Product - Topic_General → Domain_General - _Common 신설: Math(구 Topic_Math_Specialty), Reasoning(구 General/From_Thinking & Reasoning), Reasoning_Creativity(구 General/From_창의성), Communication(Poetic_Blog_Writing + From_writing) - 타 도메인의 From_* 폴더는 유지 (출처 표기일 뿐, 이미 도메인에 맞게 분류된 문서) - 빈 폴더 정리 (memory/procedures) - 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Antigravity Agent
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---
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id: html-div
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title: "HTML Div"
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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: ["div element", "div tag", "block container", "div layout", "div centering"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.88
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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", "layout"]
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raw_sources: ["https://www.w3schools.com/html/html_div.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[HTML Div]]
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## 🎯 한 줄 통찰 (One-line insight)
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The `<div>` element is a block-level container that groups other HTML elements together so they can be styled and laid out as a unit. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **`<div>` is a container** for other HTML elements. [S1]
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- **Block-level by default** — the `<div>` element is by default a block element, meaning it takes all available width and comes with line breaks before and after. [S1]
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- **No required attributes** — the `<div>` element has no required attributes, but `style`, `class`, and `id` are common. [S1]
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- **Centering** — to center a non-full-width `<div>`, set a width and the CSS `margin` property to `auto`. [S1]
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- **Side-by-side layout** — multiple `<div>` elements can be aligned horizontally using Float, Inline-block, Flexbox, or Grid. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Grouping pattern** — wrap a heading and its paragraph(s) in a `<div>` to treat them as one logical section. [S1]
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- **Centering pattern** — give the `<div>` a fixed width and `margin: auto` to center it horizontally. [S1]
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- **Horizontal layout pattern** — apply a layout technique (Float / Inline-block / Flexbox / Grid) to place several `<div>` containers in columns. [S1]
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## 📖 세부 내용 (Details)
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**The `<div>` Element.** The `<div>` element is used as a container for other HTML elements. The `<div>` element is by default a block element, meaning that it takes all available width, and comes with line breaks before and after. The `<div>` element has no required attributes, but `style`, `class`, and `id` are common. [S1]
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Grouping a section with a `<div>`: [S1]
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```html
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<div>
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<h2>London</h2>
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<p>London is the capital city of England.</p>
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</div>
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```
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**Center align a `<div>` element.** If you have a `<div>` element that is not 100% wide, and you want to center-align it, set the CSS `margin` property to `auto`. [S1]
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```css
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div {
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width: 300px;
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margin: auto;
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}
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```
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**Multiple `<div>` elements.** You can have many `<div>` containers on the same page. [S1]
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```html
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<div>
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<h2>London</h2>
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<p>London is the capital city of England.</p>
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</div>
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<div>
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<h2>Oslo</h2>
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<p>Oslo is the capital city of Norway.</p>
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</div>
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```
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**Aligning `<div>` elements side by side.** There are several CSS methods to lay out `<div>` elements horizontally. [S1]
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*Float* — use `float: left` with percentage widths (e.g. 33% for three columns): [S1]
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```css
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.mycontainer {
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width: 100%;
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overflow: auto;
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}
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.mycontainer div {
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width: 33%;
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float: left;
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}
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```
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*Inline-block* — change the display property from block to `inline-block`: [S1]
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```css
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div {
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width: 30%;
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display: inline-block;
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}
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```
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*Flexbox* — apply `display: flex` on a parent container: [S1]
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```css
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.mycontainer {
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display: flex;
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}
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.mycontainer > div {
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width: 33%;
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}
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```
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*Grid* — use `display: grid` with the `grid-template-columns` property: [S1]
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```css
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.grid-container {
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display: grid;
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grid-template-columns: 33% 33% 33%;
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}
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```
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**HTML Tag Reference.** [S1]
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| Tag | Description |
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|---|---|
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| `<div>` | Defines a section in a document (block-level) |
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## 🛠️ 적용 사례 (Applied in summary)
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The city-grouping examples (London, Oslo) and the four horizontal-layout techniques (Float, Inline-block, Flexbox, Grid) are the canonical applied examples. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Container div (HTML):
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```html
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<div>
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<h2>Title</h2>
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<p>Content.</p>
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</div>
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```
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Centered div (CSS):
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```css
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div {
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width: 300px;
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margin: auto;
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}
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```
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Three-column flexbox (CSS):
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```css
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.mycontainer {
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display: flex;
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}
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.mycontainer > div {
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width: 33%;
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}
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```
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## ⚖️ 비교 및 선택 기준 (Comparison & decision criteria)
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For aligning `<div>` elements side by side, the source presents four approaches: [S1]
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- **Float** — `float: left` with percentage widths; container uses `overflow: auto`.
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- **Inline-block** — set `display: inline-block` and a width on each div.
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- **Flexbox** — `display: flex` on the parent container (modern, flexible).
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- **Grid** — `display: grid` with `grid-template-columns` (advanced layout control).
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source. [S1]
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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:** 0.88
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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 Block and Inline]], [[HTML Classes]], [[HTML Id]], [[HTML Iframes]]
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- **참조 맥락:** Referenced whenever grouping or laying out page sections as block-level containers.
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## 📚 출처 (Sources)
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- [S1] W3Schools — HTML Div Element — https://www.w3schools.com/html/html_div.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "HTML Div Element" page (Astra wiki-curation, P-Reinforce v3.1 format).
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