[xsl] extracting a substring between two tags

[Rahil <qamar_rahil@xxxxxxxxxxx>]

Hi

I have a block of HTML such as

<TR>
       <TD width="50%"><FONT SIZE="3" COLOR="blue">Checking for 
existence of Burning value of Wood...</FONT></TD>
       <TD width="50%"><FONT SIZE="3" COLOR="#6666FF">Exists as a 
Restriction Class: <B>hasAbsoluteState&nbsp;burningCharacter
                                                                      
[10244]</B></FONT></TD>
</TR>

I want to extract the substring 'hasAbsoluteState&nbsp;burningCharacter' 
from the result of TR/TD[2]. I did something similar earlier using the 
long method of substring-after() and substring-before() but I wanted to 
know if theres a better way of applying the substring() function between 
say the two tags <B></B> or something similar ?

Thanks

Rahil