missing quote mark for attribute value

Hello all,

 

I'm using HTMLValidator plugin for Firefox 2.0 to check the output of my
asp.net website.

 

I'm getting the error "missing quote mark for attribute value".

 

The error always occurs when I have something like that on my page:

 

<span id="mySpan" xml="<><><><><><>"></span>

 

When I change the line into

 

<span id="mySpan" xml="<><><><><>"></span>

 

I don't get the error any more. 

 

If <>-brackets are not allowed in property attributes why do I get an
error in case 1 and no error in case 2? Isn't that a bit odd?

 

 

Can someone please tell me, what the cause for his error message is?

 

Thanks in advance,

Florian Vielhauer