XML无法找到元素的声明

Question

Hello I'm still kinda new to XML, and while I did look around for this problem the answers I found didn't quite fit with my issue. When I validate this xml it comes up with the error "Cannot find the declaration of element 'sites' ". I can't seem to figure out what is going on exactly and I was curious if anyone could help.

XML below

  <sites xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:xsi="http://example.com/weekendfunsnacks/site"
      xsi:schemaLocation="http://example.com/weekendfunsnacks/site  sites.xsd">

    <xs:import namespace="http://sitemaps.org/schemas/sitemap/0.9"
         schemaLocation="http://sitemaps.org/schemas/sitemap/0.9sitemap.xsd" />

XSD

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:cc="http://example.com/weekendfunsnacks/sites"
xmlns:sm="http://www.sitemaps.org/schemas/sitemap/0.9"
targetNamespace="http://example.com/weekendfunsnacks/sites"
elementFormDefault="qualified" attributeFormDefault="unqualified">

<xs:element name="sites">
  <xs:complexType>
     <xs:sequence>
        <xs:element name="site" maxOccurs="unbounded" minOccurs="0">
           <xs:complexType>
              <xs:sequence>
                 <xs:element type="xs:string" name="name"/>
                 <xs:element type="xs:byte" name="totalPages"/>
                </xs:sequence>
              </xs:complexType>
            </xs:element>
         </xs:sequence>
      </xs:complexType>
   </xs:element>
</xs:schema>

Thanks for any help!

Answer 1

You have a couple of problems:

• sites is not recognised because the schema declares that elementFormDefault="qualified" - this means that elements in the schema are in the schema's target namespace. <sites> declares an element in the global namespace - <sites> and <prefix:sites> are different elements . Create a namespace prefix and use it to qualify the <sites> element in your instance document to fix this error.
• <sites> is not closed - this is not well-formed XML, assuming this is your whole document.

In answer to your followup comment: <xs:sites> is not correct, because the prefix xs is declared as a prefix for http://www.w3.org/2001/XMLSchema-instance . <sites> is not in this namespace - it's in http://example.com/weekendfunsnacks/sites . So to add a new namespace prefix, add an attribute xmlns:prefix="http://example.com/weekendfunsnacks/sites" to the sites element, then use that prefix on the sites element.