Bonjour,
 
J'aurais besoin d'aide pour créer le schema XML (ainsi que l'XSD associé) correspondant à un fichier txt plat (avec séparateur un peu compliqué.  Dans le fichier, chaque enregistrement se découpe en 3 parties :
- 1 ligne entête dont le premier champ à la valeur 101
- Un nombre de lignes variable dont la valeur du premier champ est 201
- 1 ligne total dont le premier champ à la valeur 301
 
Voici à quoi il ressemble :
 
101;115207;800756839;F;01102008;05102008;
201;115207;481463;108AVG51;;;VP;524;LLOY;Loyer financier;488,98;95,84;584,82;EUR;19,60;01102008;31102008;
201;115207;481463;108AVG51;;;VP;524;LMAIASS;Maintenance & Assistance;103,26;20,24;123,50;EUR;19,60;01102008;31102008;
201;115207;481463;108AVG51;;;VP;524;LPNE;Pneumatiques;62,08;12,17;74,25;EUR;19,60;01102008;31102008;
201;115207;481463;108AVG51;;;VP;524;LVER;Véhicule de remplacement;6,44;1,26;7,70;EUR;19,60;01102008;31102008;
201;115207;481463;108AVG51;;;VP;524;LCAR;Gestion carburant;1,52;0,30;1,82;EUR;19,60;01102008;31102008;
201;115207;481463;108AVG51;;;VP;524;LARSK;Assurance Autorisk;28,30;0,00;28,30;EUR;0,00;01102008;31102008;
201;115207;481463;108AVG51;;;VP;524;LSRSK;Service Autorisk;35,81;7,02;42,83;EUR;19,60;01102008;31102008;
301;115207;800756839;F;01102008;726,39;136,83;863,22;EUR;
101;334229;800757637;F;01102008;01112008;
201;334229;517270;401AXK51;ANNE SOPHIE SOLANET;;VP;149;LLOY;Loyer financier;438,59;85,96;524,55;EUR;19,60;01102008;31102008;
201;334229;517270;401AXK51;ANNE SOPHIE SOLANET;;VP;149;LMAIASS;Maintenance & Assistance;67,41;13,21;80,62;EUR;19,60;01102008;31102008;
201;334229;517270;401AXK51;ANNE SOPHIE SOLANET;;VP;149;LPNE;Pneumatiques;48,10;9,43;57,53;EUR;19,60;01102008;31102008;
201;334229;517270;401AXK51;ANNE SOPHIE SOLANET;;VP;149;LVER;Véhicule de remplacement;13,03;2,55;15,58;EUR;19,60;01102008;31102008;
201;334229;517270;401AXK51;ANNE SOPHIE SOLANET;;VP;149;LCAR;Gestion carburant;0,83;0,16;0,99;EUR;19,60;01102008;31102008;
201;334229;517270;401AXK51;ANNE SOPHIE SOLANET;;VP;149;LARSK;Assurance Autorisk;28,30;0,00;28,30;EUR;0,00;01102008;31102008;
201;334229;517270;401AXK51;ANNE SOPHIE SOLANET;;VP;149;LSRSK;Service Autorisk;35,81;7,02;42,83;EUR;19,60;01102008;31102008;
201;334229;517270;401AXK51;ANNE SOPHIE SOLANET;;VP;149;LGES;Frais de gestion;6,10;1,20;7,30;EUR;19,60;01102008;31102008;
301;334229;800757637;F;01102008;638,17;119,53;757,70;EUR;
 
 
Merci de votre aide.

Bonjour, pour ceux que ca interresserait, je suis parvenu à écrire les fichiers xml et xsd correspondant à ma demande :
 
Le fichier xml
<?xml version="1.0"?>
<file name="factures" separated="true" separator=";" maxrows="10000" commentchar="N" quotechar="&quot;" encoding="ISO-8859-1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="file:///DXsd/ALDDesc.xsd">
     
    <row rowlength="-1" maxrows="-1" name="entete">
        <column name="nbrEntete" match="101" isnumeric="true"/>
        <column name="numclientEnt" match="" isnumeric="true"/>
        <column name="numDocumentEnt" match="" isnumeric="false"/>
        <column name="typeDocEnt" match="" isnumeric="false"/>
        <column name="dateFactureEnt" match="" isnumeric="true"/>
        <column name="echeanceFactureEnt" match="" isnumeric="true"/>
        <column name="resteABlancEnt" match="" isnumeric="false"/>
    </row>  
    <row rowlength="-1" maxrows="-1" name="ligne">
        <column name="nbrDetail" match="201" isnumeric="true"/>
        <column name="numClient" match="" isnumeric="true"/>
        <column name="numAvenant" match="" isnumeric="false"/>
        <column name="numimmatric" match="" isnumeric="false"/>
        <column name="nomConduct" match="" isnumeric="false"/>
        <column name="structure" match="" isnumeric="false"/>
        <column name="codeGenre" match="" isnumeric="false"/>
        <column name="refExtClient" match="" isnumeric="false"/>
        <column name="codeProduit" match="" isnumeric="false"/>
        <column name="libelleProduit" match="" isnumeric="false"/>
        <column name="montantHT" match="" isnumeric="false"/>
        <column name="montantTVA" match="" isnumeric="false"/>
        <column name="montantTTC" match="" isnumeric="false"/>
        <column name="codeDevise" match="" isnumeric="false"/>
        <column name="tauxTVA" match="" isnumeric="false"/>
        <column name="dateDebPresta" match="" isnumeric="true"/>
        <column name="dateFinPresta" match="" isnumeric="true"/>
        <column name="resteABlanc" match="" isnumeric="false"/>
    </row>
    <row rowlength="-1" maxrows="-1" name="pied">
        <column name="nbrPied" match="301" isnumeric="true"/>
        <column name="numclientPied" match="" isnumeric="true"/>
        <column name="numDocumentPied" match="" isnumeric="false"/>
        <column name="typeDocPied" match="" isnumeric="false"/>
        <column name="dateFacturePied" match="" isnumeric="true"/>
        <column name="montantHTPied" match="" isnumeric="false"/>
        <column name="montantTVAPied" match="" isnumeric="false"/>
        <column name="montantTTCPied" match="" isnumeric="false"/>
        <column name="codeDevisePied" match="" isnumeric="false"/>
        <column name="resteABlancPied" match="" isnumeric="false"/>
    </row>
</file>  
 
Et l'xsd
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
 
 
 <xsd:element name="column">
  <xsd:complexType>
   <xsd:attribute name="name" type="xsd:string" use="required"/>
   <xsd:attribute name="match" type="xsd:string" use="optional"/>
   <xsd:attribute name="length" type="xsd:int" use="optional"/>
   <xsd:attribute name="isnumeric" type="xsd:boolean" use="optional"/>
   <xsd:attribute name="ignore" type="xsd:boolean" use="optional"/>
  </xsd:complexType>
 </xsd:element>
 
 
 <xsd:element name="row">
  <xsd:complexType>
   <xsd:choice maxOccurs="unbounded" minOccurs="1">
    <xsd:element ref="column"/>
    <xsd:element ref="row"/>
   </xsd:choice>
 
   <xsd:attribute name="rowlength" type="xsd:long" use="optional"/>
   <xsd:attribute name="maxrows" type="xsd:long" use="optional"/>
   <xsd:attribute name="name" type="xsd:string" use="required"/>
   <xsd:attribute name="ignore" type="xsd:boolean" use="optional"/>
  </xsd:complexType>
 </xsd:element>
 
 
 <xsd:element name="file">
  <xsd:complexType>
   <xsd:choice minOccurs="1" maxOccurs="unbounded">
    <xsd:element ref="row"/>
   </xsd:choice>
   <xsd:attribute name="name" type="xsd:string" use="required"/>
   <xsd:attribute name="separated" type="xsd:boolean" use="required"/>
   <xsd:attribute name="separator" type="xsd:string" use="optional"/>
   <xsd:attribute name="maxrows" type="xsd:long" use="optional"/>
   <xsd:attribute name="commentchar" type="xsd:string" use="optional"/>
   <xsd:attribute name="quotechar" type="xsd:string" use="optional"/>
   <xsd:attribute name="encoding" type="xsd:string" use="optional"/>
  </xsd:complexType>
 </xsd:element>
</xsd:schema>