INTEGER expressions return integers (whole
numbers).
INTEGER expressions can be used to combine expressions, do
arithmetic, and test conditions for conditional evaluation. The
INTEGER AND expression evaluates one or more
INTEGER expressions, returning 1 if all the
sub-expressions return non-zero values, and otherwise returning 0.
The evaluation of sub-expressions stops as soon as one returns 0.
INTEGER AND is the equivalent of the “&&”
operator in Perl and C. Used in conjunction with an
IF expression, an
AND expression can check for more than one condition.
The syntax requires one or more nested
INTEGER expressions.
See the
EXPRESSION element for DTD and attribute information.
This example uses an
INTEGER AND expression to evaluate whether the records
processed have a subject and sales rank property. If the records do not such
properties, the
REMOVE_RECORD deletes them.
<EXPRESSION TYPE="VOID" NAME="IF">
<EXPRESSION TYPE="INTEGER" NAME="AND">
<EXPRESSION TYPE="INTEGER" NAME="MATH">
<EXPRNODE NAME="TYPE" VALUE="INTEGER"/>
<EXPRNODE NAME="OPERATOR" VALUE="EQUAL"/>
<EXPRESSION TYPE="INTEGER" NAME="PROP_EXISTS">
<EXPRNODE NAME="PROP_NAME" VALUE="CATEGORY_ID"/>
</EXPRESSION>
<EXPRESSION TYPE="INTEGER" NAME="CONST">
<EXPRNODE NAME="VALUE" VALUE="0"/>
</EXPRESSION>
</EXPRESSION>
<EXPRESSION TYPE="INTEGER" NAME="MATH">
<EXPRNODE NAME="TYPE" VALUE="INTEGER"/>
<EXPRNODE NAME="OPERATOR" VALUE="EQUAL"/>
<EXPRESSION TYPE="INTEGER" NAME="PROP_EXISTS">
<EXPRNODE NAME="PROP_NAME" VALUE="SALESRANK"/>
</EXPRESSION>
<EXPRESSION TYPE="INTEGER" NAME="CONST">
<EXPRNODE NAME="VALUE" VALUE="0"/>
</EXPRESSION>
</EXPRESSION>
</EXPRESSION>
<EXPRESSION TYPE="VOID" NAME="REMOVE_RECORD"/>
</EXPRESSION>
