isempty

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<mm:isempty> Checks if parent writer is empty.
see alsoisnotempty
attributes
condition attributes
writerreferrer attributes
example 1
<mm:field name="title">
  <mm:isempty>
    No title!
  </mm:isempty>
  <mm:isnotempty>
    <mm:write />
  </mm:isnotempty>
</mm:field>
     
example 2
<mm:field name="title" write="true">
  <mm:isempty>
    No title!
  </mm:isempty>
</mm:field>
     
example 3
<mm:field name="subtitle" write="true">
  <mm:isempty>
    <mm:field name="title" />
  </mm:isempty>
</mm:field>
java.lang.IllegalStateException: Cannot get the field 'subtitle' from node with is null