mattcasters commented on issue #6972:
URL: https://github.com/apache/hop/issues/6972#issuecomment-4213662702

   I don't mind having feature requests for not serializing empty values or for 
adding default values to the properties.
   It could be a String as default, even if it's not a String data type since 
you can consider it to be the value from the XML element.   Still, I think it's 
easier to just to add the default values to the class constructor, especially 
if you're not serializing empties.   Perhaps, in the larger scheme, looking at 
YAML and other formats, it might be easier to allow for class to be specified 
to determine whether or not a property should be serialized or considered 
"empty".
   So you could have a default implementation of that which tests if the object 
is null or an empty string, plus checks some global configuration option.   For 
value lengths you can make one that tests `==-1`.


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