diff --git a/build/classes/fr/devinsy/xid/FilePresenter.class b/build/classes/fr/devinsy/xid/FilePresenter.class
index ee698d8..c8c2d21 100644
Binary files a/build/classes/fr/devinsy/xid/FilePresenter.class and b/build/classes/fr/devinsy/xid/FilePresenter.class differ
diff --git a/build/classes/fr/devinsy/xid/StringPresenter.class b/build/classes/fr/devinsy/xid/StringPresenter.class
index 8dd411f..ec785cd 100644
Binary files a/build/classes/fr/devinsy/xid/StringPresenter.class and b/build/classes/fr/devinsy/xid/StringPresenter.class differ
diff --git a/src/fr/devinsy/xid/FilePresenter.java b/src/fr/devinsy/xid/FilePresenter.java
index d748307..f801c4d 100644
--- a/src/fr/devinsy/xid/FilePresenter.java
+++ b/src/fr/devinsy/xid/FilePresenter.java
@@ -1,7 +1,7 @@
 package fr.devinsy.xid;
 
 import java.io.*;
-import org.w3c.dom.*;
+
 
 
 /**
@@ -17,6 +17,7 @@ public class FilePresenter extends DomPresenter
 
 	protected String sourceFilePathname;
 	protected long sourceFileTime;
+	protected String doctype;
 
 	/*
 	 *
@@ -26,6 +27,7 @@ public class FilePresenter extends DomPresenter
 		this.sourceFilePathname = null;
 		this.sourceFileTime = 0;
 		this.doc = null;
+		this.doctype = "";
 	}
 
 
@@ -37,6 +39,7 @@ public class FilePresenter extends DomPresenter
 		this.sourceFilePathname = filePathname;
 		this.sourceFileTime = 0;
 		this.doc = null;
+		this.doctype = "";
 	}
 
 
@@ -48,6 +51,7 @@ public class FilePresenter extends DomPresenter
 		this.sourceFilePathname = filePathname;
 		this.sourceFileTime = 0;
 		this.doc = null;
+		this.doctype = "";
 	}
 
 
@@ -81,10 +85,10 @@ public class FilePresenter extends DomPresenter
 	{
 		StringBuffer result;
 
-		String sourceFilePath = this.sourceFilePathname;
-
+		logger.info("doXid for file [" + this.sourceFilePathname + "]");
+		
 		// Get the good tree.
-		File source = new File (sourceFilePath);
+		File source = new File (this.sourceFilePathname);
 
 		if (source == null)
 		{
@@ -95,17 +99,17 @@ public class FilePresenter extends DomPresenter
 		}
 		else if (!source.exists ())
 		{
-			String errorMessage = "source file defined but not found (" + sourceFilePath + ")";
+			String errorMessage = "source file defined but not found (" + this.sourceFilePathname + ")";
 			logger.error (errorMessage);
 			result = null;
 			throw new Exception (errorMessage);
 		}
 		else if ((this.doc == null) ||
-				(this.sourceFileTime != source.lastModified ()))
+				 (this.sourceFileTime != source.lastModified ()))
 		{
 			this.sourceFileTime = source.lastModified ();
-			this.doc = Presenter.fileToTree (sourceFilePath);
-
+			this.doc = Presenter.fileToTree (this.sourceFilePathname);
+			this.doctype = getDoctype(this.sourceFilePathname);
 			if (this.doc != null)
 			{
 				Presenter.addMetaTag (doc, "generator", "XID 0.0");
@@ -114,6 +118,9 @@ public class FilePresenter extends DomPresenter
 
 		// Build the web page.
 		StringWriter htmlCode = new StringWriter(Presenter.estimatedTargetLength(source.length()));
+		htmlCode.write(doctype);
+		htmlCode.write('\n');
+		
 		Presenter.doXid (htmlCode, doc, datas);
 		result = htmlCode.getBuffer();
 
@@ -122,6 +129,33 @@ public class FilePresenter extends DomPresenter
 	}
 
 
+	static public String getDoctype (String filePathname) throws Exception
+	{
+		String result;
+
+		//
+		BufferedReader in = new BufferedReader (new FileReader (filePathname));
+		String doctype = in.readLine();
+		in.close();
+		
+		logger.info("doctype=[" + doctype + "]");
+		
+		//
+		if ((doctype.startsWith ("<!DOCTYPE")) ||
+			(doctype.startsWith ("<!doctype")))
+		{
+			result = doctype;
+		}
+		else
+		{
+			result = null;
+		}
+
+		//
+		return (result);
+	}
+
+	
 	/*
 	 * Xid a file without data.
 	 */
diff --git a/src/fr/devinsy/xid/StringPresenter.java b/src/fr/devinsy/xid/StringPresenter.java
index 36eb0c0..9d311f5 100644
--- a/src/fr/devinsy/xid/StringPresenter.java
+++ b/src/fr/devinsy/xid/StringPresenter.java
@@ -99,6 +99,11 @@ public class StringPresenter extends DomPresenter
 		}
 
 		StringWriter htmlCode = new StringWriter(Presenter.estimatedTargetLength(this.html.length()));
+		if ((this.html.startsWith ("<!DOCTYPE")) ||
+			(this.html.startsWith ("<!doctype")))
+		{
+			htmlCode.write(this.html.substring(0, this.html.indexOf('>')));
+		}
 		Presenter.doXid (htmlCode, doc, datas);
 		StringBuffer htmlTarget = htmlCode.getBuffer();