well, im just going to list them one by one, it wont be big starting out but it will grow as i tinker. also feel free to elave a msg with others you find, if i dont already got them up.

Modifying weapons/meshes

fireConstraintType

StarBaseUpgradeLevel

Example:

    fireConstraintType "StarBaseUpgradeLevel"
    requiredStarBaseWeaponLevel 2 <--- the specific upgrade level that is referenced in the actual "StarBaseUpgrade(race)Weapons.entity" file.

Research

    fireConstraintType "Research"
    researchPrerequisites
        NumResearchPrerequisites 1
        ResearchPrerequisite
            Subject "RESEARCHSUBJECT_PLANETMODULEIMPROVEMENT_TECHHANGARDEFENSE"
            Level 1
    WeaponEffects
        weaponType "Projectile"
        burstCount 6
        burstDelay 0.100000
        muzzleEffectName "Weapon_TechCapitalAutoCannonLight_Muzzle"
        muzzleSoundMinRespawnTime 10.000000
        muzzleSounds
            soundCount 3
            sound "WEAPON_TECHCAPITALAUTOCANNONLIGHT_MUZZLE"
            sound "WEAPON_TECHCAPITALAUTOCANNONLIGHT_MUZZLE_ALT1"
            sound "WEAPON_TECHCAPITALAUTOCANNONLIGHT_MUZZLE_ALT2"
        hitEffectName "Weapon_TechCapitalAutoCannonLight_Hit"
        hitHullEffectSounds
            soundCount 1
            sound "WEAPONIMPACT_PHYSICALLIGHT_HITHULL"
        hitShieldsEffectSounds
            soundCount 1
            sound "WEAPONIMPACT_GENERICLIGHT_HITSHIELDS"
        projectileTravelEffectName "Weapon_TechCapitalAutoCannonLight_Travel"

CanAlwaysFire   <---- normal constraint used on every ship with a weapon.

Mesh Info Count

Research

MeshNameInfo
    meshName "PlanetModule_TechOrbitalHangarDefenseAntiAirGuns"
    criteriaType "Research"
    prerequisites
        NumResearchPrerequisites 1
        ResearchPrerequisite
            Subject "RESEARCHSUBJECT_PLANETMODULEIMPROVEMENT_TECHHANGARDEFENSE"
            Level 1

StarBaseUpgradeLevel <--- like in fire constraint type, just references the meshes as well.

MeshNameInfo
    meshName "StarBaseTech-Trade"
    criteriaType "StarBaseUpgradeLevel"
    levelRequirements
        levelRequirementCount 1
        levelRequirement
            upgradePropertyType "TradePortMeshLevel"
            upgradeLevel 1

Abilities:

buffInstantActionType

CreateStarBase

useCostType

Resources

useCostType "Resources"
resourceCost
    credits 1000.000000
    metal 100.000000
    crystal 125.000000
cooldownTime
    Level:0 10.000000
    Level:1 0.000000
    Level:2 0.000000