Multiple Conditions for dmx-show attribute

Trying to add some multiple conditions to the dmx-show attribute. This is not multiple attributes, but multiple conditions for an attribute. For example, display an element if value A = x and value B = y and value C = Z. I can’t get it to work. This is what I have:

`dmx-show="WorkStarted == true && Workers = 0 && Status != "Workcomplete" "`

This does not seem to work. I’ve also used && instead of the escapement.