mini-database (using html data attributes) inside character sheet for feats and spells in custom game

I'm working on a custom character sheet. I want to create a little mini-database of feats and spells. Each feat or spell will have multiple attributes which can be searched for. (eg: Themes, Relevant Attributes, and Mechanics-Categories)

For example: 

<div class="sheet-feat" data-skins="nature, alchemy" data-attributes="intellect, empathy" data-categories="control, root">
</div>


I have a working jsfiddle, but I can't get it to work in Roll20. It seems like roll20 strips out my data- attributes in the html.
https://jsfiddle.net/L035dLsz/3/

Anyone know what I'm doing wrong?

I got it working by putting the database tags in the title field. It's a bit goofy, but it works.

It'd be cool if we had more access to arbitrary data- attributes. or if we had a couple of dummy data attributes we could use (like the data-i18n tag) for character sheet development.

I'd be happy with one called data-tags or something like that.

That's interesting. Have to experiment...
 We actually do use data-i18n for translations.

Yeah. With data-i18n reserved for internationalization, I didn't want to hijack it for my feat database tags.