The research tradeskill recipes contain data for both old and new recipes. PEQ uses the old recipes. Other serves may use the new recipes. The two systems are, essentially, two different tradeskill systems.

Furthermore, under the old research system, mage research is different than necro research which is different... you get the idea.

The container is the key to unraveling the mess. Adding a search parameter to include the container or classes or old/new status would really help when dealing with a database that includes both systems.

New spell research
Spell Research Kit (93492)

Old research, makes spells L1-49/50
Tome of Endless Enchantments (17500)
Book of Dark Bindings (17501)
Elemental Grimoire (17502)
Lexicon (17903)
Phantasmal Tome (17652)
Arch Magus Grimoire (17653)
Warlock's Book of Binding (17654)
Sorcerer's Lexicon (17655)

Old research, makes spells 50/51-65, recipes added with LoY expansion
Phantasmal Tome (17652)
Arch Magus Grimoire (17653)
Warlock's Book of Binding (17654)
Sorcerer's Lexicon (17655)

Old research, makes Enchanter spells
Tome of Endless Enchantments (17500)
Phantasmal Tome (17652)

Old research, makes Magician spells
Elemental Grimoire (17502)
Arch Magus Grimoire (17653)

Old research, makes Necromancer spells
Book of Dark Bindings (17501)
Warlock's Book of Binding (17654)

Old research, makes Wizard spells
Lexicon (17903)
Sorcerer's Lexicon (17655)

Old research, makes Cleric spells
Phantasmal Tome (17652)
Arch Magus Grimoire (17653)
Warlock's Book of Binding (17654)
Sorcerer's Lexicon (17655)

Old research, makes Druid spells
Phantasmal Tome (17652)
Arch Magus Grimoire (17653)
Warlock's Book of Binding (17654)
Sorcerer's Lexicon (17655)

Old research, makes Shaman spells
Phantasmal Tome (17652)
Arch Magus Grimoire (17653)
Warlock's Book of Binding (17654)
Sorcerer's Lexicon (17655)

Old research, makes practice runes
Concordance of Research (17504)

I like this, good idea; Added it to the to-do list.

There are other uses for similar search parameters:

Cultural smithing is made in a race specific forge. Cultural tailoring is made in a race specific tailoring kit. Fletching too. Baking has mixing bowl vs. oven recipes. Pottery has pottery wheel vs kiln recipes.

Trying to distinguish between old alchemy (potions) and new alchemy (distillates) is much harder. Both sets of recipes use the same containers. Not all old alchemy recipes are called potions. Not all new alchemy recipes are called distillates. From what I remember, old alchemy potions never stacked. Special 5 dose and 10 dose recipes were created to overcome the stacking issue. New alchemy potions/distillates can stack, though I don't know if all do.