在delphi中使用xml文档有两种方法 
  使用xml broker, 是delphi 内置的。例: 
  unit ShowXML; 
  interface 
  uses Classes  HTTPApp  Db  DbClient  Midas  
    XMLBrokr  WebComp  MidItems; 
  type 
    TCustomShowXMLButton = class(TXMLButton  IScriptComponent) 
    protected 
      XMLMethodName: string; 
      { IScriptComponent } 
      procedure AddElements(AddIntf: IAddScriptElements); 
      function GetSubComponents: TObject; 
      { IWebContent implementation } 
      function ImplContent(Options: TWebContentOptions;