These are in the following character entity files:
ISOnum:<!ENTITY quot SDATA "[quot ]"--=quotation mark-->
ISOnum:<!ENTITY laquo SDATA "[laquo ]"--=angle quotation mark, left-->
ISOnum:<!ENTITY raquo SDATA "[raquo ]"--=angle quotation mark, right-->
ISOnum:<!ENTITY lsquo SDATA "[lsquo ]"--=single quotation mark, left-->
ISOnum:<!ENTITY rsquo SDATA "[rsquo ]"--=single quotation mark, right-->
ISOnum:<!ENTITY ldquo SDATA "[ldquo ]"--=double quotation mark, left-->
ISOnum:<!ENTITY rdquo SDATA "[rdquo ]"--=double quotation mark, right-->
ISOpub:<!ENTITY lsquor SDATA "[lsquor]"--=rising single quote, left (low)-->
ISOpub:<!ENTITY ldquor SDATA "[ldquor]"--=rising dbl quote, left (low)-->
ISOpub:<!ENTITY rdquor SDATA "[rdquor]"--rising dbl quote, right (high)-->
ISOpub:<!ENTITY rsquor SDATA "[rsquor]"--rising single quote, right (high)-->
so you use the ‘like this’ to get `like this', but most
browsers do not (yet) support characters from these entity sets.
///Peter