isSet(...)

The isSet(...) function can be used to check whether an object is available in the current context. This is useful if an object is context-dependent, e.g. the system object #cs .

The syntax of the isSet(...) function is as follows:

$CMS_IF(isSet(OBJECT))$
  VALUE
$CMS_END_IF$

The isSet(...) function can only be applied to an object and not to an expression.

Examples

Check whether the system object #cs is available:

$CMS_IF(isSet(#cs))$
  The system object #cs is available.
$CMS_ELSE$
  The system object #cs is not available.
$CMS_END_IF$

Check whether the variable sizeConstant is available in the context:

$CMS_IF(isSet(sizeConstant))$
  The Variable sizeConstant is available in the context.
$CMS_END_IF$

isSet(...) and the system object #link

In addition to the check whether an object exists in the context, the isSet(...) invocation can be used on a #link system object to check whether a specific field has been set or not.

The invocation is as follows:

$CMS_IF(#link.isSet("FIELDNAME"))$
  VALUE
$CMS_END_IF$

The invocation expects the name of the field to be checked as the parameter.

The possible fields of a link are given in the list in the system object #link:

List of the fields

Examples

Check whether the text field has been set:

$CMS_IF(#link.isSet("text"))$
  A value has been set for the "text" field
$CMS_END_IF$

Check whether the target field has been set:

$CMS_IF(#link.isSet("target"))$
  A value has been set for the "target" field
$CMS_END_IF$