How to declare element

Question

I\'m looking for validate an XML document with xrm prefix as you can read here :

I wrote the following XML Schema :

Answer 1

xrm is a namespace prefix, an abbreviation for the namespace. As the syntax error indicates, a namespace prefix is not declared via xsd:element/@name. Instead, declare only the local name (plugin) and handle the namespace prefix declaration at the XSD level...

Here is a simplified set of your XML and XSD where the XML validates successfully against the XSD:

XML

<?xml version="1.0" encoding="UTF-8"?>
<xrm:plugin xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://www.moss.fr/2011/connecteur_xrm result.xsd"
            xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            xmlns:xrm="http://www.moss.fr/2011/connecteur_xrm">
  <xrm:header>
    <xrm:tracabilite>
      <xrm:reference_moss>MPD_4.1.1.0</xrm:reference_moss>
      <xrm:document_lie> </xrm:document_lie>
      <xrm:document_interface>SC-DIF-OT3402-0002-MOSS 1.8 - DIF COSCA Inc.2.doc</xrm:document_interface>
      <xrm:intervention>
        <xrm:auteur>Générateur de mapping v1.0</xrm:auteur>
        <xrm:date>14/01/2013</xrm:date>
        <xrm:commentaire>Génération du fichier de mapping</xrm:commentaire>
      </xrm:intervention>
    </xrm:tracabilite>
  </xrm:header>
</xrm:plugin>

XSD

<?xml version="1.0" encoding="utf-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            xmlns:xrm="http://www.moss.fr/2011/connecteur_xrm"
            xmlns:SCCOAMCD="urn:SCCOA-schemaInfo"
            xmlns:SBEGestionZonesAeriennesSYSCA="urn:SBEGestionZonesAeriennesSYSCA-schema"
            SCCOAMCD:desc="  implémentation du MCD pivot du SCCOA 3.2.1ec  production par SCCOA mcd2mpd 4.1.1, le 11/12/2007  règles spécifiques production schémas 1.2  diagramme : A-SC.SBE GestionZonesAeriennes SYSCA  entité racine      : A-SC.ZoneAerienne "
            attributeFormDefault="unqualified"
            elementFormDefault="qualified"
            targetNamespace="http://www.moss.fr/2011/connecteur_xrm"
            version="3.2.1ec">
  <xsd:complexType name="header">
    <xsd:sequence>
      <xsd:any minOccurs="1" processContents="lax"/>
    </xsd:sequence>
  </xsd:complexType>
  <xsd:element name="plugin">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element name="header" type="xrm:header"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>
</xsd:schema>