JSON-T help

Hi, 

Are there supposed to me more JSON-T formatters than the ones listed on the template doc? Is there another documentation somewhere I can look up? What I'm trying to do is to check if each tag 'contains' a certain word. So far I only know the {equal?}, but I don't think it would work  in this case. Another workaround I can think of is to extract the first word of each tag, after it's being 'slugified', then use the {equal?} formatter to check. How do I achieve this? 

Below is the code of what I have now..

{.repeated section tags}
  <a class="article-tag" href="{collection.fullUrl}?category={@|url-encode}">{@}</a>{.alternates with}, 
{.end}

Thank you!!!

Hi,
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