overlapping b and i elements
<p>he<b>ll<i>o w</b>or</i>ld</p>
contary to the article it can still be represented as a tree, by decomposing the children into their own nodes (so in this case characters become nodes with child nodes expressing what formatting is active, followed by the letter, and then turn of all the active formatting)
contary to the article it can still be represented as a tree, by decomposing the children into their own nodes (so in this case characters become nodes with child nodes expressing what formatting is active, followed by the letter, and then turn of all the active formatting)