html tag question

**duuudie** · Feb 28, 2004 07:21

could someone explain to me the difference between this way of opening a page

Code:

<html>

and this way?

Code:

 
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" >

thanks a lot

**Paul O'B** · Feb 28, 2004 09:20

Hi,

The second version is the correct way to specify the xml namespace in an xhtml documents.

Originally Posted by w3c

A Strictly Conforming XHTML Document is an XML document that requires only the facilities described as mandatory in this specification. Such a document must meet all of the following criteria:

It must conform to the constraints expressed in one of the three DTDs found in DTDs and in Appendix B.
The root element of the document must be html.
The root element of the document must contain an xmlns declaration for the XHTML namespace [XMLNS]. The namespace for XHTML is defined to be http://www.w3.org/1999/xhtml. An example root element might look like
Code:
```
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
```

Have a look here for some more information on the subject:

http://www.w3.org/TR/xhtml1/#normative

Hope that helps.

Paul

**duuudie** · Feb 28, 2004 10:59

thanks a lot for the links. That helps...

**Friedrich** · Feb 29, 2004 05:05

Huch, I did not even know about this! I mean all the sites I actually make are XHTML 1.1 Strict but I have never used this attributes. Well, seems like I have to add them...

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