+<!DOCTYPE x [
+ <!ENTITY com "computer">
+]>
<collection xmlns="http://www.loc.gov/MARC21/slim">
<record xmlns="http://www.loc.gov/MARC21/slim">
<rank>1</rank>
<subfield code="a">Jack Collins</subfield>
</datafield>
<datafield tag="245" ind1="1" ind2="0">
- <subfield code="a">How to program a computer</subfield>
+ <subfield code="a">How to program a &com;</subfield>
</datafield>
<datafield tag="260" ind1="1" ind2=" ">
<subfield code="a">Penguin</subfield>