uses standard Windows XmlLite API
supports Windows 32 and Windows 64
available for Delphi/C++ Builder 7 - 10.3 and Lazarus 1.8.4
source code included in registered version
royalty free distribution in applications

API

const
  XmlFileExtension = '.xml';
  XmlMIME = 'application/xml';

type
  TXmlNode =
  (
    xnNone,
    xnElement,
    xnAttribute,
    xnText,
    xnCData,
    xnProcessingInstruction,
    xnComment,
    xnDocumentType,
    xnWhitespace,
    xnEndElement,
    xnXmlDeclaration
  );

  TXmlReader = class
  public
    constructor Create(Stream: IStream; const Encoding: string = '');
    constructor Create(Stream: TStream; const Encoding: string = '');
    constructor Create(const FileName: string; const Encoding: string = '');

    procedure Attribute(const Name: string; const Namespace: string = '');
    procedure Element;
    procedure FirstAttribute;
    procedure NextAttribute;
    function Read: Boolean;

    property AttributeCount: Integer read;
    property Depth: Integer read;
    property EmptyElement: Boolean read;
    property Eof: Boolean read;
    property Line: Integer read;
    property Name: string read;
    property Namespace: string read;
    property Node: TXmlNode read;
    property Position: Integer read;
    property Prefix: string read;
    property QualifiedName: string read;
    property Reader: IXmlReader read;
    property Value: string read;
  end;

  TXmlWriter = class
  public
    constructor Create(Stream: IStream; const Encoding: string = '');
    constructor Create(Stream: TStream; const Encoding: string = '');
    constructor Create(const FileName: string; const Encoding: string = '');

    procedure StartDocument;
    procedure EndDocument;

    procedure StartElement(const Name: string; const Prefix: string = ''; const Namespace: string = '');
    procedure EndElement;

    procedure Attribute(const Name: string; const Value: string; const Prefix: string = ''; const Namespace: string = '');
    procedure CData(const Data: string);
    procedure Comment(const Text: string);
    procedure Raw(const Data: string);
    procedure Text(const Text: string);

    procedure Flush;

    property Indent: Boolean read write;
    property Writer: IXmlWriter read;
    property XmlDeclaration: Boolean read write;
  end;
Examples
// create XML document
with TXmlWriter.Create('document.xml') do
try
  Indent := True;
  StartDocument;
    StartElement('element1');

      Comment('comment');

      StartElement('element2');
        Attribute('attribute1', 'value1');
        Attribute('attribute2', 'value2');
        Text('Hello, world!');
      EndElement;

      StartElement('element3');
        CData('data');
      EndElement;

    EndElement;
  EndDocument;
finally
  Free;
end;

// parse XML document
var
  Text: string;
  I: Integer;

with TXmlReader.Create('document.xml') do
try
  while Read do
  begin
    Text := IntToStr(Line) + ',' + IntToStr(Position) + ': ' + NodeToString(Node);
    case Node of
      xnElement:
      begin
        Text := Text + ': ' + Name;
        Element;
        FirstAttribute;
        for I := 1 to AttributeCount do
        begin
          Text := Text + ' ' + Name + '=' + Value;
          NextAttribute;
        end;
      end;

      xnText: Text := Text + ': ' + Value;
      xnCData: Text := Text + ': ' + Value;
      xnComment: Text := Text + ': ' + Value;
      xnWhitespace: Text := Text + ': "' + Value + '"';
      xnEndElement: Text := Text + ': ' + Name;
      xnXmlDeclaration: Text := Text + ': ' + Name;
    end;
    ShowMessage(Text);
  end
finally
  Free;
end;

Only for V.I.P