xbrli:xbrl 

XBRL instance root element.

Element Information

Model

link:schemaRef+ , link:linkbaseRef* , link:roleRef* , link:arcroleRef* , (xbrli:item | xbrli:tuple | xbrli:context | xbrli:unit | link:footnoteLink)
Children: link:arcroleRef, link:footnoteLink, link:linkbaseRef, link:roleRef, link:schemaRef, xbrli:context, xbrli:item, xbrli:tuple, xbrli:unit

Attributes

QName Type Fixed Default Use Inheritable Annotation
id country:ID optional
Wildcard: ANY attribute from namespace(s) 'http://www.w3.org/XML/1998/namespace'

Source 

<element name="xbrl">
  <annotation>
    <documentation>XBRL instance root element.</documentation>
  </annotation>
  <complexType>
    <sequence>
      <element ref="link:schemaRef" minOccurs="1" maxOccurs="unbounded"/>
      <element ref="link:linkbaseRef" minOccurs="0" maxOccurs="unbounded"/>
      <element ref="link:roleRef" minOccurs="0" maxOccurs="unbounded"/>
      <element ref="link:arcroleRef" minOccurs="0" maxOccurs="unbounded"/>
      <choice minOccurs="0" maxOccurs="unbounded">
        <element ref="xbrli:item"/>
        <element ref="xbrli:tuple"/>
        <element ref="xbrli:context"/>
        <element ref="xbrli:unit"/>
        <element ref="link:footnoteLink"/>
      </choice>
    </sequence>
    <attribute name="id" type="ID" use="optional"/>
    <anyAttribute namespace="http://www.w3.org/XML/1998/namespace" processContents="lax"/>
  </complexType>
</element>

Sample