[xml] need correct string function

[kmq gmx at]

hi.

easy question:

what is the function to manage this:
("&lt;"), ("<"));
("&gt;"), (">"));
("&amp;"), ("&"));
("&apos;"), ("'"));
("&quot;"), ("\""));

Example:

string = FunctionX("please_convert_me_'_<_>_&_\"");

string2 = "<blah param='";
string2 += string;
string2 += "'/>";