<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="http://www.portalfiscal.inf.br/nfe" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" targetNamespace="http://www.portalfiscal.inf.br/nfe" elementFormDefault="qualified" attributeFormDefault="unqualified">    
  <xs:element name="nfceDownloadXML">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="tpAmb" minOccurs="1" maxOccurs="1">
          <xs:simpleType>
        <xs:restriction base="xs:integer">
            <xs:minInclusive value="0"/>
            <xs:maxInclusive value="9"/>
        </xs:restriction>
          </xs:simpleType>
        </xs:element>
        <xs:element name="chNFCe" minOccurs="1" maxOccurs="1" >
          <xs:simpleType>
            <xs:restriction base="xs:string">
               <xs:pattern value="[0-9]{6}[A-Z0-9]{12}[0-9]{26}"/>
            </xs:restriction>
          </xs:simpleType>
        </xs:element>
      </xs:sequence>
      <xs:attribute name="versao">
	   <xs:simpleType>
              <xs:restriction base="xs:string">
                <xs:pattern value="[0-9]{1}[.][0-9]{0,2}"/>
              </xs:restriction>
	   </xs:simpleType>
	</xs:attribute>
    </xs:complexType>
  </xs:element>
</xs:schema>