xml namespaces - What does "xmlns" in XML mean? -

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मैंने एक XML फ़ाइल में निम्नलिखित पंक्ति देखी: 

  xmlns: android = "http : //schemas.android.com/apk/res/android "

मैंने कई अन्य एक्सएमएल फाइलों में xmlns को भी देखा है, जो मेरे पास आये हैं

यह क्या है?

यह एक को परिभाषित करता है

आपके उदाहरण में, नेमस्पेस उपसर्ग है " एंड्रॉइड " और नामस्थान यूआरआई है " "

दस्तावेज़ में, आप तत्वों को देख सकते हैं जैसे: & android: foo / & gt;

पूर्ण नामस्थान यूआरआई के लिए एक छोटे नाम उपनाम के साथ एक वेरिएबल के रूप में नाम स्थान उपसर्ग यह & lt; http: //schemas.android.com/apk/res/android: foo / & gt; के बराबर है इसका क्या मतलब है " जब एक XML पार्सर दस्तावेज़ पढ़ता है

नोट: आप XML नाम दस्तावेज़ में नेमस्पेस उपसर्ग के स्थान पर वास्तव में पूर्ण नेमस्पेस यूआरआई का उपयोग नहीं कर सकते हैं।

नामस्थानों पर इस ट्यूटोरियल को देखें:


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