这是一个有效的XML吗？

Question

我觉得这个XML无效,有人可以解释一下原因吗？

我认为它有点东西这个点我的元素名称？

estate_price.price_suggestion

还有什么其他的东西对这个XML无效吗？

XML

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

<iad>
  <DataTag>
    <element id="0">
      <changed_string>content</changed_string>
      <no_of_bedrooms>content</no_of_bedrooms>
      <published_string>content</published_string>
      <mmo>content</mmo>
      <postcode>content</postcode>
      <utmx>content</utmx>
      <utmy>content</utmy>
      <disposed>content</disposed>
      <property_type>content</property_type>
      <isprivate>content</isprivate>
      <heading>content</heading>
      <published>content</published>
      <estate_price.price_suggestion>content</estate_price.price_suggestion>
      <ownership_type>content</ownership_type>
      <estate_size.useable_area>content</estate_size.useable_area>
      <adid>content</adid>
      <address>content</address>
      <sqmtrprice>content</sqmtrprice>
      <estate_size.primary_room_area>content</estate_size.primary_room_area>
      <location>content</location>
      <changed>content</changed>
      <orgname>content</orgname>
    </element>
    <element id="1">
      <changed_string>content</changed_string>
      <no_of_bedrooms>content</no_of_bedrooms>
      <published_string>content</published_string>
      <mmo>content</mmo>
      <postcode>content</postcode>
      <utmx>content</utmx>
      <utmy>content</utmy>
      <disposed>content</disposed>
      <property_type>content</property_type>
      <isprivate>content</isprivate>
      <heading>content</heading>
      <published>content</published>
      <estate_price.price_suggestion>content</estate_price.price_suggestion>
      <ownership_type>content</ownership_type>
      <estate_size.useable_area>content</estate_size.useable_area>
      <adid>content</adid>
      <address>content</address>
      <sqmtrprice>content</sqmtrprice>
      <estate_size.primary_room_area>content</estate_size.primary_room_area>
      <location>content</location>
      <changed>content</changed>
      <orgname>content</orgname>
    </element>
  </DataTag>
</iad>

Answer 1

有两个级别的优秀XML文档:格式良好且有效.格式良好意味着您遵守XML标准,有效意味着您符合模式.

Schema是一个规范,说明您正在使用哪个元素以及哪个元素可以在另一个元素中使用.您可以使用DTD,XSD(W3C Schema),Relax NG等来指定架构.