xml - 验证 Google Atom Feed

标签 xml xsd xsd-validation

我在尝试基于 Google Atom feed 验证 XML 文档时遇到以下错误。

Error - Line 8, 10: org.xml.sax.SAXParseException; lineNumber: 8; columnNumber: 10; cvc-complex-type.2.4.a: Invalid content was found starting with element 'g:brand'. One of '{"xxx..w3.org/2005/Atom":id, "xxx.w3.org/2005/Atom":title, ".w3.org/2005/Atom":link, "xxx.w3.org/2005/Atom":brand}' is expected.

这是我的 XML:

    <?xml version="1.0" encoding="UTF-8"?>
    <feed xmlns="http://www.w3.org/2005/Atom" xmlns:g="http://base.google.com/ns/1.0">
        <title>The name of your data feed.</title>
        <link rel="self" href="http://www.example.com"/>
        <updated>2006-06-11T18:30:02Z</updated>
    <entry>
    <title>Red wool sweater</title>
    <g:brand>Acme</g:brand>
    <g:condition>new</g:condition>
    <summary>Comfortable and soft, this sweater will keep you warm on those cold winter nights.</summary>
    <id>1</id>
    <g:image_link>http://www.example.com/image1.jpg</g:image_link>
    <link href="http://www.example.com/item1-info-page.html"/>
    <g:mpn>ABC123</g:mpn>
    <g:price>25</g:price>
    <g:product_type>Clothing &amp; Accessories &gt; Clothing &gt; Outerwear &gt; Sweaters</g:product_type>
    <g:quantity>3</g:quantity>
    <g:shipping>
       <g:country>US</g:country>
       <g:region>MA</g:region>
       <g:service>Ground</g:service>
       <g:price>5.95</g:price>
    </g:shipping>
    <g:shipping>
       <g:country>US</g:country>
       <g:region>024*</g:region>
       <g:service>Ground</g:service>
       <g:price>7.95</g:price>
    </g:shipping>
    <g:tax>
       <g:country>US</g:country>
       <g:region>CA</g:region>
       <g:rate>8.25</g:rate>
       <g:tax_ship>y</g:tax_ship>
    </g:tax>
    <g:tax>
       <g:country>US</g:country>
       <g:region>926*</g:region>
       <g:rate>8.75</g:rate>
       <g:tax_ship>y</g:tax_ship>
    </g:tax>
    <g:upc>0001230001232</g:upc>
    <g:weight>0.1 lb</g:weight>
    </entry>
    </feed>

这是我的 XSD:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="http://www.w3.org/2005/Atom"
           elementFormDefault="qualified"
           attributeFormDefault="unqualified"
           xmlns:atom="http://www.w3.org/2005/Atom"
           xmlns:g="http://base.google.com/ns/1.0"
           xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:import namespace="http://www.w3.org/XML/1998/namespace"
             schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>
  <xs:element name="feed" type="atom:feedType"/>
  <xs:element name="entry" type="atom:entryType"/>
  <xs:element name="extended_attribute" type="atom:extendedAttributeType"/>
  <xs:complexType name="textType" mixed="true">
    <xs:sequence>
      <xs:any namespace="http://www.w3.org/1999/xhtml" minOccurs="0"/>
    </xs:sequence>
    <xs:attribute name="type">
      <xs:simpleType>
        <xs:restriction base="xs:token">
          <xs:enumeration value="text"/>
          <xs:enumeration value="html"/>
          <xs:enumeration value="xhtml"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>
  <xs:complexType name="idType">
    <xs:simpleContent>
      <xs:extension base="xs:anyURI">
        <xs:attributeGroup ref="atom:commonAttributes"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="feedType">
    <xs:choice minOccurs="3" maxOccurs="unbounded">
      <xs:element name="link" type="atom:linkType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="title" type="atom:textType" minOccurs="1" maxOccurs="1"/>
      <xs:element name="updated" type="atom:dateTimeType" minOccurs="1" maxOccurs="1"/>
      <xs:element name="entry" type="atom:entryType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:any namespace="##other" minOccurs="0" maxOccurs="unbounded"/>
    </xs:choice>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>
  <xs:complexType name="extendedAttributeType">
    <xs:choice  maxOccurs="unbounded">
      <xs:element name="name" type="xs:string" minOccurs="1" maxOccurs="1"/>
      <xs:element name="value" type="xs:string" minOccurs="1" maxOccurs="1"/>
    </xs:choice>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>
  <xs:complexType name="entryType">
    <xs:choice maxOccurs="unbounded">
      <xs:element name="id" type="atom:idType" minOccurs="1" maxOccurs="1"/>
      <xs:element name="title" type="atom:textType" minOccurs="1" maxOccurs="1"/>
      <xs:element name="link" type="atom:linkType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="brand" type="xs:string" minOccurs="0" maxOccurs="unbounded"/>
    </xs:choice>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>

  <xs:complexType name="linkType" mixed="true">
    <xs:attribute name="href" use="required" type="xs:anyURI"/>
    <xs:attribute name="rel" type="xs:string" use="optional"/>
    <xs:attribute name="type" use="optional" type="xs:string"/>
    <xs:attribute name="hreflang" use="optional" type="xs:NMTOKEN"/>
    <xs:attribute name="title" use="optional" type="xs:string"/>
    <xs:attribute name="length" use="optional" type="xs:positiveInteger"/>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>

  <xs:complexType name="dateTimeType">
    <xs:simpleContent>
      <xs:extension base="xs:dateTime">
        <xs:attributeGroup ref="atom:commonAttributes"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:attributeGroup name="commonAttributes">
    <xs:attribute ref="xml:base"/>
    <xs:attribute ref="xml:lang"/>
    <xs:anyAttribute namespace="##other"/>
  </xs:attributeGroup>
</xs:schema>

我猜测该错误与 XML 中声明的命名空间 (xmlns:g="http://base.google.com/ns/1.0") 有关。我已将其输入到 XSD 的 targetNamespace 中，但我无法让它工作。

最佳答案

原子 1.0 XSD

The Atom Syndication Format是一项建立标准 existing XSD :

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="http://www.w3.org/2005/Atom"
           elementFormDefault="qualified"
           attributeFormDefault="unqualified"
           xmlns:atom="http://www.w3.org/2005/Atom"
           xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:annotation>
    <xs:documentation>
      This version of the Atom schema is based on version 1.0 of the format specifications,
      found here http://www.atomenabled.org/developers/syndication/atom-format-spec.php.
    </xs:documentation>
  </xs:annotation>
  <xs:import namespace="http://www.w3.org/XML/1998/namespace"
             schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>
  <xs:annotation>
    <xs:documentation>
      An Atom document may have two root elements, feed and entry, as defined in section 2.
    </xs:documentation>
  </xs:annotation>
  <xs:element name="feed" type="atom:feedType"/>
  <xs:element name="entry" type="atom:entryType"/>
  <xs:complexType name="textType" mixed="true">
    <xs:annotation>
      <xs:documentation>
        The Atom text construct is defined in section 3.1 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:any namespace="http://www.w3.org/1999/xhtml" minOccurs="0"/>
    </xs:sequence>
    <xs:attribute name="type">
      <xs:simpleType>
        <xs:restriction base="xs:token">
          <xs:enumeration value="text"/>
          <xs:enumeration value="html"/>
          <xs:enumeration value="xhtml"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>
  <xs:complexType name="personType">
    <xs:annotation>
      <xs:documentation>
        The Atom person construct is defined in section 3.2 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:choice minOccurs="1" maxOccurs="unbounded">
      <xs:element name="name" type="xs:string" minOccurs="1" maxOccurs="1"/>
      <xs:element name="uri" type="atom:uriType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="email" type="atom:emailType" minOccurs="0" maxOccurs="1"/>
      <xs:any namespace="##other"/>
    </xs:choice>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>
  <xs:simpleType name="emailType">
    <xs:annotation>
      <xs:documentation>
        Schema definition for an email address.
      </xs:documentation>
    </xs:annotation>
    <xs:restriction base="xs:normalizedString">
      <xs:pattern value="\w+@(\w+\.)+\w+"/>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="feedType">
    <xs:annotation>
      <xs:documentation>
        The Atom feed construct is defined in section 4.1.1 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:choice minOccurs="3" maxOccurs="unbounded">
      <xs:element name="author" type="atom:personType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="category" type="atom:categoryType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="contributor" type="atom:personType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="generator" type="atom:generatorType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="icon" type="atom:iconType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="id" type="atom:idType" minOccurs="1" maxOccurs="1"/>
      <xs:element name="link" type="atom:linkType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="logo" type="atom:logoType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="rights" type="atom:textType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="subtitle" type="atom:textType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="title" type="atom:textType" minOccurs="1" maxOccurs="1"/>
      <xs:element name="updated" type="atom:dateTimeType" minOccurs="1" maxOccurs="1"/>
      <xs:element name="entry" type="atom:entryType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:any namespace="##other" minOccurs="0" maxOccurs="unbounded"/>
    </xs:choice>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>
  <xs:complexType name="entryType">
    <xs:annotation>
      <xs:documentation>
        The Atom entry construct is defined in section 4.1.2 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:choice maxOccurs="unbounded">
      <xs:element name="author" type="atom:personType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="category" type="atom:categoryType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="content" type="atom:contentType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="contributor" type="atom:personType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="id" type="atom:idType" minOccurs="1" maxOccurs="1"/>
      <xs:element name="link" type="atom:linkType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="published" type="atom:dateTimeType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="rights" type="atom:textType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="source" type="atom:sourceType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="summary" type="atom:textType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="title" type="atom:textType" minOccurs="1" maxOccurs="1"/>
      <xs:element name="updated" type="atom:dateTimeType" minOccurs="1" maxOccurs="1"/>
      <xs:any namespace="##other" minOccurs="0" maxOccurs="unbounded"/>
    </xs:choice>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>
  <xs:complexType name="contentType" mixed="true">
    <xs:annotation>
      <xs:documentation>
        The Atom content construct is defined in section 4.1.3 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:any namespace="##other" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="type" type="xs:string"/>
    <xs:attribute name="src" type="xs:anyURI"/>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>
  <xs:complexType name="categoryType">
    <xs:annotation>
      <xs:documentation>
        The Atom cagegory construct is defined in section 4.2.2 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:attribute name="term" type="xs:string" use="required"/>
    <xs:attribute name="scheme" type="xs:anyURI" use="optional"/>
    <xs:attribute name="label" type="xs:string" use="optional"/>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>
  <xs:complexType name="generatorType">
    <xs:annotation>
      <xs:documentation>
        The Atom generator element is defined in section 4.2.4 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute name="uri" use="optional" type="xs:anyURI"/>
        <xs:attribute name="version" use="optional" type="xs:string"/>
        <xs:attributeGroup ref="atom:commonAttributes"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="iconType">
    <xs:annotation>
      <xs:documentation>
        The Atom icon construct is defined in section 4.2.5 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base="xs:anyURI">
        <xs:attributeGroup ref="atom:commonAttributes"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="idType">
    <xs:annotation>
      <xs:documentation>
        The Atom id construct is defined in section 4.2.6 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base="xs:anyURI">
        <xs:attributeGroup ref="atom:commonAttributes"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="linkType" mixed="true">
    <xs:annotation>
      <xs:documentation>
        The Atom link construct is defined in section 3.4 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:attribute name="href" use="required" type="xs:anyURI"/>
    <xs:attribute name="rel" type="xs:string" use="optional"/>
    <xs:attribute name="type" use="optional" type="xs:string"/>
    <xs:attribute name="hreflang" use="optional" type="xs:NMTOKEN"/>
    <xs:attribute name="title" use="optional" type="xs:string"/>
    <xs:attribute name="length" use="optional" type="xs:positiveInteger"/>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>
  <xs:complexType name="logoType">
    <xs:annotation>
      <xs:documentation>
        The Atom logo construct is defined in section 4.2.8 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base="xs:anyURI">
        <xs:attributeGroup ref="atom:commonAttributes"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="sourceType">
    <xs:annotation>
      <xs:documentation>
        The Atom source construct is defined in section 4.2.11 of the format spec.
      </xs:documentation>
    </xs:annotation>
    <xs:choice maxOccurs="unbounded">
      <xs:element name="author" type="atom:personType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="category" type="atom:categoryType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="contributor" type="atom:personType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="generator" type="atom:generatorType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="icon" type="atom:iconType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="id" type="atom:idType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="link" type="atom:linkType" minOccurs="0" maxOccurs="unbounded"/>
      <xs:element name="logo" type="atom:logoType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="rights" type="atom:textType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="subtitle" type="atom:textType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="title" type="atom:textType" minOccurs="0" maxOccurs="1"/>
      <xs:element name="updated" type="atom:dateTimeType" minOccurs="0" maxOccurs="1"/>
      <xs:any namespace="##other" minOccurs="0" maxOccurs="unbounded"/>
    </xs:choice>
    <xs:attributeGroup ref="atom:commonAttributes"/>
  </xs:complexType>
  <xs:complexType name="uriType">
    <xs:simpleContent>
      <xs:extension base="xs:anyURI">
        <xs:attributeGroup ref="atom:commonAttributes"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="dateTimeType">
    <xs:simpleContent>
      <xs:extension base="xs:dateTime">
        <xs:attributeGroup ref="atom:commonAttributes"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:attributeGroup name="commonAttributes">
    <xs:attribute ref="xml:base"/>
    <xs:attribute ref="xml:lang"/>
    <xs:anyAttribute namespace="##other"/>
  </xs:attributeGroup>
</xs:schema>

但是，即使使用此 XSD 来验证 XML 仍然会导致如下错误:

[Error] feed.xml:12:14: cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'g:brand'.

Google Base 命名空间

消除与 http://base.google.com/ns/1.0 Google Base namespace extensions 相关的错误，您有两个选择:

  1. 将 Google Base XSD 导入 Atom XSD:

    <xs:import namespace="http://base.google.com/ns/1.0"
           schemaLocation="base-google.xsd"/>

    这里的挑战是 (a) 与 http://base.google.com/ns/1.0 命名空间关联的 XSD 似乎并不存在于众所周知的官方位置，并且(b) XSD 可能未被维护。我找到了一个here 。 [如果有人知道更官方或更最新的 Google Base XSD，请发表评论，我将更新链接。]

  2. 将xsd:any/@processContents="strict"(默认值)放松为lax。 (有关差异，请参见processContents strict vs lax vs skip for xsd:any。)

您选择哪条路线取决于您希望对 xsd:any 下的 Google 元素进行多少验证。第一条路线将提供更严格的验证，但您的下一个问题将是您必须更改 XML 或 XSD 以修复进一步的错误，例如没有声明 g:mpn。第二条路线将幸福地忽略此类错误。

关于xml - 验证 Google Atom Feed，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28482958/

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