<!DOCTYPE somedoc [

<!ENTITY a   "something">
<!ENTITY b   "&a;">

]>

<somedoc>

<somebeacon someattribute=“&b;”/>

&a; should appear after colon: &a; &b; should appear after colon: &a; &a; should appear after colon: &b; &b; should appear after colon: &b;

</somedoc>