<if>

  <if (expr|true|false)="exprcondition" >
    statement *
  [ <else>
    statement * ]
  </if>

  <if (expr|true|false)="exprcondition-1" >
    statement *
  <elseif expr="exprcondition-2" >
    statement *
    ...
  <elseif (expr|true|false)="exprcondition-N" >
    statement *
  [ <else>
    statement * ]
  </if>

A ``if´´ tag allows conditional execution of statement of conditional choice of two statements, executing one or the other but not both. See if statement.

A ``if .. elseif´´ tag allows conditional execution of one of chained if statements. Executing the first statement whose condition evalutes to "true".

Attributes:

expr

Condition expression.

true

Condition expression, same as expr.

false

Negated condition expression. I.e. first group of statements is executed iff the condition yields "false", otherwise the second group (if any) is executed.

Note: conditions are mutually exclusive.

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