On Sunday, April 22, 2018 at 4:29:41 AM UTC+2, TonyM wrote:
>
>
> *My Special use case of a variable I do not use for logical (display or 
> dont display contents)*
>
 

> A Common filter seems to be "[is[current]<fieldname>] -[[no]]" to display 
> if fieldname has a value of "yes"
>

IMO the right way to decide if you want to show something using the list 
widget is

Using tag=script

<$list filter="[all[current]tag[script]]">
...  your content comes here 
</$list>




if a tiddler has the non empty field named: hugo

<$list filter="[all[current]has[hugo]]">
show me
</$list>



if a tiddler contains a field hugo, that contains the value "a" 

<$list filter="[all[current]hugo[a]]">
show me
</$list>




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