That allows to load values ​​from a json file, xml or csv among others.
Allow dropdown groups to be made to filter content according to the selected value.
A graphic representation of the idea.

Dropdown1

Dropdown1.1

Dropdown1.1.1
Dropdown1.1.2
Dropdown1.1.3
Dropdown1.2
Dropdown1.2.1
Dropdown1.2.2
Dropdown1.2.3
Dropdown1.3
Dropdown1.3.1
Dropdown1.3.2
Dropdown1.3.3
Dropdown2
Dropdown2.1
Dropdown2.1.1
Dropdown2.1.2
Dropdown2.1.3
Dropdown2.2
Dropdown2.2.1
Dropdown2.2.2
Dropdown2.2.3
Dropdown2.3
Dropdown2.3.1
Dropdown2.3.2
Dropdown2.3.3
That allows to add a key associated to the text, type data dictionary.