XML validation with SCHEMA [PHP]

I can validate an .xml file with -> schemaValidate(.xsd)

the schema I use is the one below. (I'll put a preview).

<?xml version="1.0" encoding="UTF-8"?>
    
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.portalfiscal.inf.br/nfe" xmlns="http://www.portalfiscal.inf.br/nfe" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:editix="http://www.portalfiscal.inf.br/nfe" xmlns:xs="http://www.w3.org/2001/XMLSchema">
        <xs:import namespace="http://www.w3.org/2000/09/xmldsig#" schemaLocation="xmldsig-core-schema_v1.01.xsd"/>
        <xs:include schemaLocation="tiposBasico_v4.00.xsd"/>
        <xs:complexType name="TNFe">
            <xs:annotation>
                <xs:documentation>Tipo Nota Fiscal Eletr??nica</xs:documentation>
            </xs:annotation>
            <xs:sequence>
                <xs:element name="infNFe">
                    <xs:annotation>
                        <xs:documentation>Informa?�?�es da Nota Fiscal Eletr??nica</xs:documentation>
                    </xs:annotation>
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="ide">
                                <xs:annotation>
                                    <xs:documentation>identifica?�??o da NF-e</xs:documentation>
                                </xs:annotation>
                                <xs:complexType>
                                    <xs:sequence>
                                        <xs:element name="cUF" type="TCodUfIBGE">
                                            <xs:annotation>
                                                <xs:documentation>C??digo da UF do emitente do Documento Fiscal. Utilizar a Tabela do IBGE.</xs:documentation>
                                            </xs:annotation>
                                        </xs:element>
                                        <xs:element name="cNF">
                                            <xs:annotation>
                                                <xs:documentation>C??digo num?�rico que comp?�e a Chave de Acesso. N??mero aleat??rio gerado pelo emitente para cada NF-e.</xs:documentation>
                                            </xs:annotation>
                                            
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I would like your help to adapt the code below. If when I find an error I consult access this node:<xs:annotation></xs:documentation>I need this message</xs:annotation> <xs:documentation> and inform the schema message.

the code that I use:

libxml_use_internal_errors(true);
libxml_clear_errors();
$dom = new DOMDocument('1.0', 'utf-8');
$dom->preserveWhiteSpace = false;
$dom->formatOutput = false;
$dom->loadXML($xml, LIBXML_NOBLANKS | LIBXML_NOEMPTYTAG);
libxml_clear_errors();
if (! $dom->schemaValidate($xsd)) {
      $errors = [];
      foreach (libxml_get_errors() as $error) {
             $errors[] = $error->message;
      }
      throw ValidatorException::xmlErrors($errors);
}
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Could you help me?

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