XML Schema

[Angelo1974]

Ciao a tutti; supponiamo io abbia un file XML in cui ci debba essere almeno uno degli elementi nome, cognome e dataNascita.... come posso indicarlo in uno schema?
Cioè vorrei che lo schema indicasse che almeno uno di questi tre deve esse presente... è possibile?
Grazie e ciao

[Cheope]

Suppongo che tu debba imparare a fare gli schemi...
Puoi iniziare da qui:

http://pro.html.it/articoli/id_175/idcat_33/pro.html

http://www.w3schools.com/xml/default.asp

[Angelo1974]

Grazie della risposta... diciamo che per quanto riguarda i link che mi hai dato li conosco abbastanza bene e non mi dicono nulla in merito a quello che mi interessa circa gli schema; io ho questo schema:

<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <xsd:simpleType name="codiceIndividuo">
        <xsd:restriction base="xsd:string">
            <xsd:whiteSpace value="collapse"/>
            <xsd:pattern value="[0-9]{10}"/>
        </xsd:restriction>
    </xsd:simpleType>
    <xsd:simpleType name="codiceFamiglia">
        <xsd:restriction base="xsd:string">
            <xsd:whiteSpace value="collapse"/>
            <xsd:pattern value="[0-9a-zA-Z]{2,10}"/>
        </xsd:restriction>
    </xsd:simpleType>
    <xsd:simpleType name="cognome">
        <xsd:restriction base="xsd:string">
            <xsd:whiteSpace value="collapse"/>
            <xsd:pattern value="[a-zA-Z0-9]{2,50}"/>
        </xsd:restriction>
    </xsd:simpleType>
    <xsd:simpleType name="nome">
        <xsd:restriction base="xsd:string">
            <xsd:whiteSpace value="collapse"/>
            <xsd:pattern value="[0-9A-Za-z]{2,50}"/>
        </xsd:restriction>
    </xsd:simpleType>
    <xsd:simpleType name="dataNascita">
        <xsd:restriction base="xsd:date"/>
    </xsd:simpleType>
    <xsd:simpleType name="sesso">
        <xsd:restriction base="xsd:string">
            <xsd:whiteSpace value="collapse"/>
            <xsd:pattern value="[mfMF]{1}"/>
        </xsd:restriction>
    </xsd:simpleType>
    <xsd:complexType name="comuneNascita">
        <xsd:sequence>
            <xsd:element name="codIstat" type="xsd:string"/>
            <xsd:element name="descrizione" type="xsd:string"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:simpleType name="siglaProvNascita">
        <xsd:restriction base="xsd:string"/>
    </xsd:simpleType>
    <xsd:simpleType name="statoCivile">
        <xsd:restriction base="xsd:string"/>
    </xsd:simpleType>
    <xsd:simpleType name="gradoParentela">
        <xsd:restriction base="xsd:string"/>
    </xsd:simpleType>
    <xsd:simpleType name="statoIndividuo">
        <xsd:restriction base="xsd:string"/>
    </xsd:simpleType>
    <xsd:complexType name="toponomastica">
        <xsd:sequence>
            <xsd:element name="toponimo" type="xsd:string"/>
            <xsd:element name="descrizioneVia" type="xsd:string"/>
            <xsd:element name="numeroCivico" type="xsd:string"/>
            <xsd:element name="scala" type="xsd:string"/>
            <xsd:element name="lettera" type="xsd:string"/>
            <xsd:element name="interno" type="xsd:string"/>
            <xsd:element name="piano" type="xsd:string"/>
            <xsd:element name="lotto" type="xsd:string"/>
            <xsd:element name="isolato" type="xsd:string"/>
            <xsd:element name="codiceQuartiere" type="xsd:string"/>
            <xsd:element name="descrizioneQuartiere" type="xsd:string"/>
            <xsd:element name="codiceVia" type="xsd:string"/>
            <xsd:element name="km" type="xsd:string"/>
            <xsd:element name="cap" type="xsd:string"/>
            <xsd:element name="capVia" type="xsd:string"/>
            <xsd:element name="codIstatComune" minOccurs="0" type="xsd:string"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:complexType name="paternita">
        <xsd:sequence>
            <xsd:element name="cognome" type="xsd:string"/>
            <xsd:element name="nome" type="xsd:string"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:complexType name="maternita">
        <xsd:sequence>
            <xsd:element name="nome" type="xsd:string"/>
            <xsd:element name="cognome" type="xsd:string"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:complexType name="attoNascita">
        <xsd:sequence>
            <xsd:element name="numero" type="xsd:string"/>
            <xsd:element name="anno" type="xsd:string"/>
            <xsd:element name="parte" type="xsd:string"/>
            <xsd:element name="serie" type="xsd:string"/>
            <xsd:element name="ufficio" type="xsd:string"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:complexType name="attoNascitaTrascritto">
        <xsd:sequence>
            <xsd:element name="descrizioneComuneTrascrizione" type="xsd:string"/>
            <xsd:element name="numero" type="xsd:string"/>
            <xsd:element name="anno" type="xsd:string"/>
            <xsd:element name="parte" type="xsd:string"/>
            <xsd:element name="serie" type="xsd:string"/>
            <xsd:element name="ufficio" type="xsd:string"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:simpleType name="descrizioneStatoCivile">
        <xsd:restriction base="xsd:string"/>
    </xsd:simpleType>
    <xsd:complexType name="coniuge">
        <xsd:sequence>
            <xsd:element name="nome" type="xsd:string"/>
            <xsd:element name="cognome" type="xsd:string"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:complexType name="matrimonio">
        <xsd:sequence>
            <xsd:element name="data" type="xsd:date"/>
            <xsd:element name="descrizioneComune" type="xsd:string"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:complexType name="attoMatrimonio">
        <xsd:sequence>
            <xsd:element name="numero" type="xsd:string"/>
            <xsd:element name="parte" type="xsd:string"/>
            <xsd:element name="serie" type="xsd:string"/>
            <xsd:element name="ufficio" type="xsd:string"/>
            <xsd:element name="anno" type="xsd:string"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:complexType name="attoTrascrittoMatrimonio">
        <xsd:sequence>
            <xsd:element name="numero" type="xsd:string"/>
            <xsd:element name="parte" type="xsd:string"/>
            <xsd:element name="serie" type="xsd:string"/>
            <xsd:element name="ufficio" type="xsd:string"/>
            <xsd:element name="anno" type="xsd:string"/>
            <xsd:element name="descrizioneComune" type="xsd:string"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:simpleType name="stringaUltimaImmigrazione">
        <xsd:restriction base="xsd:string"/>
    </xsd:simpleType>
    <xsd:simpleType name="stringaUltimaEmigrazione">
        <xsd:restriction base="xsd:string"/>
    </xsd:simpleType>
    <xsd:simpleType name="cittadinanaza">
        <xsd:restriction base="xsd:string"/>
    </xsd:simpleType>
    <xsd:simpleType name="codiceFiscale">
        <xsd:restriction base="xsd:string">
            <xsd:whiteSpace value="collapse"/>
            <xsd:pattern value="[0-9a-zA-Z]{16}"/>
        </xsd:restriction>
    </xsd:simpleType>
    <xsd:element name="outputVisura">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element name="globale" type="globale"/>
                <xsd:element name="datiUtente" minOccurs="0" type="datiUtente"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
    <xsd:complexType name="globale">
        <xsd:sequence>
            <xsd:element name="esitoRicerca" type="xsd:string"/>
            <xsd:element name="descrizioneRicerca" type="xsd:string"/>
            <xsd:element name="dataSistema" type="xsd:date"/>
        </xsd:sequence>
    </xsd:complexType>
    <xsd:complexType name="datiUtente">
        <xsd:sequence>
            <xsd:element name="codiceIndividuo" type="codiceIndividuo"/>
            <xsd:element name="codiceFamiglia" type="codiceFamiglia"/>
            <xsd:element name="cognome" type="cognome"/>
            <xsd:element name="nome" type="nome"/>
            <xsd:element name="dataNascita" type="dataNascita"/>
            <xsd:element name="sesso" type="sesso"/>
            <xsd:element name="comuneNascita" type="comuneNascita"/>
            <xsd:element name="siglaProvinciaNascita" type="siglaProvNascita"/>
            <xsd:element name="statoCivile" type="statoCivile"/>
            <xsd:element name="gradoParentela" type="gradoParentela"/>
            <xsd:element name="statoIndividuo" type="statoIndividuo"/>
            <xsd:element name="toponomastica" type="toponomastica"/>
            <xsd:element name="paternita" type="paternita"/>
            <xsd:element name="maternita" type="maternita"/>
            <xsd:element name="attoNascita" type="attoNascita"/>
            <xsd:element name="attoNascitaTrascritto" type="attoNascitaTrascritto"/>
            <xsd:element name="descrizioneStatoCivile" type="descrizioneStatoCivile"/>
            <xsd:element name="coniuge" type="coniuge"/>
            <xsd:element name="matrimonio" type="matrimonio"/>
            <xsd:element name="attoMatrimonio" type="attoMatrimonio"/>
            <xsd:element name="attoTrascrittoMatrimonio" type="attoTrascrittoMatrimonio"/>
            <xsd:element name="stringaUltimaImmigrazione" type="stringaUltimaImmigrazione"/>
            <xsd:element name="stringaUltimaEmigrazione" type="stringaUltimaEmigrazione"/>
            <xsd:element name="cittadinanza" type="cittadinanaza"/>
            <xsd:element name="codiceFiscale" type="codiceFiscale"/>
        </xsd:sequence>
    </xsd:complexType>
</xsd:schema>

Come faccio a fargli capire che in toponomastice almeno 1 dei quattro deve essere presente e non nullo?
Grazie