XML::LibXML::Schema isn't validating my xml. Why?

[Jack-133]

xml:\[code\]<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></workers>\[/code\]xml schema:\[code\]<?xml version="1.0"?><xs:schemaxmlns: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> <xs:element name="impiegato" type ="zoo:Timpiegato"/> <xs:element name="manager" type ="zoo:Tmanager"/></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" default="-1"/></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" default="-1"/></xs:sequence></xs:complexType></xs:schema>\[/code\]code:\[code\]my $xmlschema = XML::LibXML::Schema->new( location => "../xml/worker.xsd" );if (eval { $xmlschema->validate( $doc ); } eq undef) { # redirect}\[/code\]I think that the problem is in this part of the schema:\[code\]<xs:complexType name="Tworkers"><xs:sequence> <xs:element name="impiegato" type ="zoo:Timpiegato"/> <xs:element name="manager" type ="zoo:Tmanager"/></xs:sequence></xs:complexType>\[/code\]because if I run \[code\]xmllint --schema worker.xsd workers.xml\[/code\]on a terminal I get this error:\[code\]workers.xml:10: element impiegato: Schemas validity error : Element '{http://www.zoo.com}impiegato': This element is not expected. Expected is ( {http://www.zoo.com}manager ).\[/code\]Is there an alternative to xs:sequence to try? Because Impiegato and Managers elements don't have an order.