ions-xml.html#FUNCTIONS-XML-PROCESSING"
><CODE
CLASS="FUNCTION"
>xpath()</CODE
></A
>
        escapes special characters in string values (Florian Pflug)
       </P
><P
>        Without this it is possible for the result not to be valid
        <ACRONYM
CLASS="ACRONYM"
>XML</ACRONYM
>.
       </P
></LI
><LI
><P
>        Make <A
HREF="functions-admin.html#FUNCTIONS-ADMIN-DBOBJECT"
><CODE
CLASS="FUNCTION"
>pg_relation_size()</CODE
></A
>
        and friends return NULL if the object does not exist (Phil Sorbe