レッスン 2
Syntax and Namespaces 日本語ガイド
日本語の xml xml syntax and namespaces ガイド: Well-formed XML and xmlns patterns.
このコンテンツはまだ日本語で用意されていません。ローカライズが完了するまで English 版を表示しています。
Well-formed XML requires matched tags, quoted attributes, and exactly one root element. Common parse errors come from unclosed tags, & without escaping, or mismatched nesting after copy-paste.
Namespaces
Real project files declare XML namespaces so tag names from different specs do not collide:
<manifest xmlns:android="http://schemas.android.com/apk/res/android">
<application android:label="@string/app_name" />
</manifest>
The xmlns:android prefix maps android:* attributes to Android's schema URI. Formatting does not change namespace semantics—it only makes structure easier to read.
Comments and declarations
<?xml version="1.0" encoding="UTF-8"?>— optional prolog<!-- comment -->— may be removed or moved when reformatting; keep backups if comments matter
Key takeaway
Focus on matching tags and valid escaping first. Namespace prefixes are part of the syntax you validate before build tools run.