A universal is typically regarded as a type, property, or relation that something (of substance) holds. Such that an apple is red and the "redness" being the universal. Now I have a new idea about truth that is correlated with universals as follows.
Universal truths- Are properties of things that are not restricted in time nor in place. (Eternal in both time and place)
Substance truths- Is the substance (like matter or mind, heh what can I say im a dualist

) which is not restricted in time (in other words its eternal) however it is restricted in place. (Now this whole "place" thing can get very confusing, however I would say that their are two types of place, one correlated to the physical three-dimensional place, and the other being the mind or non-physical sensual awareness of surroundings.) note* substances are composed of properties, however are not just the compositions of properties, but rather are a noumenon or "the thing in itself."
Specific truths- These are the truths that have occured in a place, at a specific time (so they are eternal in their place but not in their time.)
If confused resort to the table below
Time Place
Universal truth- Eternal Eternal
Substance truth- Eternal Specific
Specific truth- Specific Eternal
That basically sums up my primitive theory of truths, however, I realize that going back over it, it's definitely confusing so I don't expect much and I am open to any thoughts or critiques.