ATMLSchemaLibrary.managers.SchemaManager.ValidateAttribute C# (CSharp) Method

        public static bool ValidateAttribute( XmlSchemaAttribute attribute, string value, SchemaValidationResult errors )
        {
            bool isValid = true;
            XmlSchemaSimpleType attributeSchemaType = attribute.AttributeSchemaType;
            XmlSchemaUse use = attribute.Use;
            string name = attribute.Name;
            bool required = ( use == XmlSchemaUse.Required );
            if (required && string.IsNullOrEmpty( value ))
            {
                isValid = false;
                errors.AddError( string.Format( "{0} is required\n", name ) );
            }
            if (attributeSchemaType.Content is XmlSchemaSimpleTypeRestriction)
            {
                XmlQualifiedName qname = attributeSchemaType.BaseXmlSchemaType.QualifiedName;
                String typeName = qname.Name;
                var restriction = (XmlSchemaSimpleTypeRestriction) attributeSchemaType.Content;
                isValid &= ProcessRestrictions( value, errors, restriction, typeName, name );
            }
            return isValid;
        }