Tight now on 0.61, UPResolutions.xml makes use of ResearchTag & the sole use of it in the tech tree (NonMilitary) as far as I can tell.  There are a lot of ways that these could be used (events/more resolutions/etc), but with only the single tag it limits the use& gives the appearance of a much more constrictive thing and increase the likelihood that tech tree modders will carry on that way making modding anything that makes use of them more difficult to combine with other mods without significant work .  I'd like to see the following tags. One for each color tech on the tree as a starting point would give UPResolution modders more room to expand creativity in a potentially intermod compatible if nothing else!

<Behavior>ResearchDiscount</Behavior>
<SpecialValue>
<Special>ResearchTag</Special>
<ValueParam>0.25</ValueParam>
<StringParam>NonMilitary</StringParam>
</SpecialValue>
<Modifier>
<EffectType>CreditsPerTurn</EffectType>
<Scope>UPResolutionGalaxy</Scope>
<Target>
<TargetType>Faction</TargetType>
</Target>
<BonusType>Multiplier</BonusType>
<Value>-0.05</Value>
</Modifier>

Edit: I make the request to stardock, because it's currently so obscure that despite existing in galcivII  in the same manner (I think?), I don't think there have been any mods to even make use of it.  if the functionality was a bit HardCoded in appearance it would help  raise awareness & allow flexible gradual use from modders as a result.