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XML DOM | DocumentType systemId Attribute

XML DOM - DocumentType systemId Attribute

Hello folks! welcome back to a new edition of our tutorial on XML DOM. In this tutorial, we are going to be studying about the XML DOM DocumentType systemId Attribute.

The DOM DocumentType systemId attribute returns the system identifier of the external subset.

Tip: This may be an absolute URI or not.


The following below is the syntax to use the DocumentType systemId Attribute -



Following are the notation.xml contents -

<?xml version = "1.0" encoding = "UTF-8" standalone = "no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" 

<address id = "firstelement">
   <name>Nkpara Kennedy</name >
   <phone>(011) 123-4567</phone>

The following example illustrates the usage of the DocumentType systemId attribute -

<!DOCTYPE html>
         function loadXMLDoc(filename) {
            if (window.XMLHttpRequest) {
               xhttp = new XMLHttpRequest();
            } else // code for IE5 and IE6 {
               xhttp = new ActiveXObject("Microsoft.XMLHTTP");
            return xhttp.responseXML;
         xmlDoc = loadXMLDoc("/dom/notation_xhtml.xml");
         document.write("<b>SystemId :</b> "+xmlDoc.doctype.systemId);


Save file as documenttype_systemId.html on the server path (this file and notation.xml should be on the same path in your server). This is going to give us the following output below -

SystemId : http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd 

Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we will be studying about XML DOM ProcessingInstruction Object.

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Thanks for reading and bye for now.

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