SchemaValidCtxt

Example: Tree: XSD based validation:

<?xml version="1.0" encoding="utf-8"?>
<books>
	<book id="1">
		<title>The Royal Game</title>
		<author>Stefan Zweig</author>
	</book>
	<book id="2">
		<title>The Stoker</title>
		<author>Franz Kafka</author>
	</book>
</books>

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
	<xs:element name="books">
		<xs:complexType>
			<xs:sequence>
				<xs:element name="book" maxOccurs="unbounded">
					<xs:complexType>
						<xs:sequence>
							<xs:element name="title" type="string"/>
							<xs:element name="author" type="string"/>
						</xs:sequence>
						<xs:attribute name="id" type="xs:integer"/>
					</xs:complexType>
				</xs:element>
			</xs:sequence>
		</xs:complexType>
	</xs:element>
</xs:schema>

public static int main (string[] args) {
	// The document:
	Xml.Doc* doc = Xml.Parser.parse_file ("books.xml");
	if (doc == null) {
		print ("File 'books.xml' not found or permissions missing\n");
		return 0;
	}

	// The schema:
	Xml.SchemaParserCtxt schema_parser = new Xml.SchemaParserCtxt ("books.xsd");
	Xml.Schema schema = schema_parser.parse ();
	if (schema == null) {
		print ("Invalid/missing schema\n");
		return 0;
	}

	Xml.SchemaValidCtxt valctxt = new Xml.SchemaValidCtxt (schema);
	if (valctxt == null) {
		print ("Unable to create a validation context\n");
		return 0;
	}


	// Validation:
	int is_valid = valctxt.validate_doc (doc);
	if (is_valid == 0) {
		print ("valid\n");
	} else {
		print ("invalid\n");
	}

	return 0;
}

valac --pkg libxml-2.0 schemas.vala