Where does the XML specification discuss the character sequence '>' followed by the combining long solidus character (U+0308)?

Hi Folks,

According to the Unicode standard, applying NFC normalization to this character sequence:

     '>' character followed immediately by the 
     long solidus character (U+0308)

results in the precomposed not-greater-than character, ≯.

Clearly that would be bad for XML, since this: 

	<comment>&#x308;</comment>

would, upon NFC normalization, yield this: 

	<comment≯</comment>

and that, of course, is non-well-formed XML.

I was told that the "XML specification addresses the solution for avoiding inadvertent ≯" but I have not been able to locate where in the XML specification it addresses this. Would you point me to the location in the XML specification that addresses this please?

/Roger