Understand several file formats of xml

[Introduction] 1 Let’s briefly introduce XML. XML is a text-based markup language, similar to HTML, which can easily store data. 2. Several formats of XML files: Format 1: View an XML CD directory [ html]view plaincopy

1. Let’s briefly introduce XML. XML is a text-based markup language, similar to HTML, which can be convenient. Storing data

2. Several formats of XML files:

Format 1: View an XML CD directory

[html] view plaincopy

<?xml version="1.0" encoding="utf-8" ?>  
<CATALOG>  
    <CD>  
        <TITLE>Empire Burlesque</TITLE>  
        <ARTIST>Bob Dylan</ARTIST>  
        <COUNTRY>USA</COUNTRY>  
        <COMPANY>Columbia</COMPANY>  
        <PRICE>10.90</PRICE>  
        <YEAR>1985</YEAR>  
    </CD>  
    <CD>  
        <TITLE>Hide your heart</TITLE>  
        <ARTIST>Bonnie Tyler</ARTIST>  
        <COUNTRY>UK</COUNTRY>  
        <COMPANY>CBS Records</COMPANY>  
        <PRICE>9.90</PRICE>  
        <YEAR>1988</YEAR>  
    </CD>  
</CATALOG>

Format 2: View an XML school grade directory

[html] view plaincopy

<?xml version="1.0" encoding="utf-8" ?>  
<config>  
    <Header  col1="班级编号" col2="班级名称" col3="年级" col4="学校" col5="男生" col6="女生"  col7="人数"/>  
    <row     col1="11" col2="一（一）班" col3="初一" col4="三峡高级中学" col5="20" col6="30"  col7="50"/>  
    <row     col1="12" col2="一（二）班" col3="初一" col4="三峡高级中学" col5="18" col6="12"  col7="30"/>  
    <row     col1="13" col2="一（三）班" col3="初一" col4="三峡高级中学" col5="16" col6="26"  col7="42"/>  
    <row     col1="14" col2="一（四）班" col3="初一" col4="三峡高级中学" col5="23" col6="17"  col7="40"/>  
</config>

3, Analysis:

1.xml can only have one root-level element, and cannot have multiple root-level elements. For example, add it in format 2 A root-level element will report an error

2.xml elements can be nested cyclically. The parent element contains child elements, and the child elements can contain their own children. Level elements,

For example, format 1: the root-level element contains the child-level element , and Child elements can contain multiple child elements of their own

3. Two forms of elements:

Form 1[Value]name> For example:

Form 2

For example:

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