无法在XML中实现名称空间 [英] Having trouble implementing namespaces in XML

问题描述

在下面的代码中，我在"7.65GB"处收到错误，它不断告诉我元素"UMUC2:size"的前缀"UMUC2"未绑定".一切看起来正确，都无法找出问题所在.

Within the code below I am receiving an error at "7.65GB", it keeps telling me "The prefix "UMUC2" for element "UMUC2:size" is not bound". Everything looks correct cannot figure out the problem.

<?xml version="1.0" encoding="UTF-8"?>

<!-- New document created with EditiX at Sat Jul 05 07:35:36 AST 2014 -->

<dataCollection xmlns:UMUC1="http://umuc.edu/namespaces/games">
xmlns:UMUC2="http://umuc.edu/namespaces/software">
xmlns:UMUC3="http://umuc.edu/namespaces/music">
xmlns:UMUC4="http://umuc.edu/namespaces/video">
    <UMUC1:size>17.5GB</UMUC1:size>
    <UMUC1:date_of_collection>01/01/2013</UMUC1:date_of_collection>
    <UMUC1:collectionSite>www.google.com</UMUC1:collectionSite>
    <UMUC2:size>7.65GB</UMUC2:size>
    <UMUC2:date_of_collection>05/28/2013</UMUC2:date_of_collection>
    <UMUC2:collectionSite>www.microsoft.com</UMUC2:collectionSite>
    <UMUC3:size>100.5GB</UMUC3:size>
    <UMUC3:date_of_collection>06/26/2013</UMUC3:date_of_collection>
    <UMUC3:collectionSite>www.apple.com</UMUC3:collectionSite>
    <UMUC4:size>1.75TB</UMUC4:size>
    <UMUC4:date_of_collection>03/27/2014</UMUC4:date_of_collection>
    <UMUC4:collectionSite>www.videox.com</UMUC4:collectionSite>
</dataCollection>

推荐答案

在您的XML中，UMUC2，UMUC3和UMUC4前缀的声明不正确.它们被解释为元素内容.

In your XML, the declarations for the UMUC2, UMUC3, and UMUC4 prefixes are not correct; they are interpreted as element content.

根元素上的名称空间声明必须看起来像这样(请注意已删除的直角括号):

The namespace declarations on the root element must look like this (note the removed right angle brackets):

<dataCollection xmlns:UMUC1="http://umuc.edu/namespaces/games"
                xmlns:UMUC2="http://umuc.edu/namespaces/software"
                xmlns:UMUC3="http://umuc.edu/namespaces/music"
                xmlns:UMUC4="http://umuc.edu/namespaces/video">

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