Can't validate XML with XML schema and Perl (XML::LibXML)

[Rhudabon]

xml:\[code\]<?xml version="1.0"?><workers xmlns="http://www.zoo.com" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" xs:schemaLocation="http://www.zoo.com worker.xsd"><impiegato> <username>mario</username> <password>de2f15d014d40b93578d255e6221fd60</password> <nome>Mario</nome> <sesso>F</sesso> <eta>23</eta></impiegato><impiegato> <username>maria</username> <password>maria</password> <nome>Mariaaa</nome> <sesso>F</sesso> <eta>443</eta></impiegato><impiegato> <username>mirco</username> <password>mirco</password> <nome>Mirco</nome> <sesso>F</sesso> <eta>27</eta></impiegato><impiegato> <username>martina</username> <password>martina</password> <nome>Martina</nome> <sesso>M</sesso> <eta>26</eta></impiegato><manager> <username>marco</username> <password>marco</password> <nome>Marco</nome> <sesso>M</sesso> <eta>25</eta></manager><manager> <username>giovanna</username> <password>zxVcGz0BPdHkY</password> <nome>Giovanna</nome> <sesso>F</sesso> <eta>24</eta></manager><manager><username>lucanervi</username> <password>zxePlNSDQjsxg</password> <nome>Luca Nervi</nome> <sesso>M</sesso> <eta>23</eta></manager></workers>\[/code\]XML schema:\[code\]<?xml version="1.0"?><xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:zoo="http://www.zoo.com" targetNamespace="http://www.zoo.com" elementFormDefault="qualified"><xs:element name="workers" type="zoo:Tworkers"/><xs:complexType name="Tworkers"><xs:sequence maxOccurs="unbounded"> <xs:element name="impiegato" type ="zoo:Timpiegato" minOccurs="0" /> <xs:element name="manager" type ="zoo:Tmanager" minOccurs="0"/></xs:sequence></xs:complexType><xs:complexType name="Timpiegato"><xs:sequence> <xs:element name="username" type ="xs:string"/> <xs:element name="password" type ="xs:string"/> <xs:element name="nome" type ="xs:string"/> <xs:element name="sesso" type ="xs:string"/> <xs:element name="eta" type ="xs:integer"/></xs:sequence></xs:complexType><xs:complexType name="Tmanager"> <xs:sequence> <xs:element name="username" type ="xs:string"/> <xs:element name="password" type ="xs:string"/> <xs:element name="nome" type ="xs:string"/> <xs:element name="sesso" type ="xs:string"/> <xs:element name="eta" type ="xs:integer"/> </xs:sequence></xs:complexType></xs:schema>\[/code\]When I validate the xml using XML::LibXML::Schema, I get:\[quote\] ../xml/workers.xml:0: Schemas validity error : Element 'impiegato': This element is not expected. Expected is one of ( {http://www.zoo.com}impiegato, {http://www.zoo.com}manager ).\[/quote\]Perl code:\[code\]my $parser = XML::LibXML->new;my $doc = $parser->parse_file("../xml/workers.xml");my $xmlschema = XML::LibXML::Schema->new( location => "../xml/worker.xsd" );$xmlschema->validate($doc);\[/code\]I think it's a problem with the namespace, but don't know what to do.Addendum:I tried to remove the elementFormDefault="qualified" attribute from the XML schema. Now I have the opposite error:\[code\]../xml/workers.xml:0: Schemas validity error : Element '{http://www.zoo.com}impiegato':This element is not expected. Expected is one of ( impiegato, manager ).\[/code\]