; Modifying this file:
; You should not modify this file except to make bugfixes or
; for other "maintenance".  If you want to make custom changes,
; you should create a new datadir subdirectory and copy this file
; into that directory, and then modify that copy.  Then use the
; command "rulesetdir <mysubdir>" in the server to have freeciv
; use your new customized file.

[datafile]
description="Variant2 technology data for Freeciv"
options="+Freeciv-2.6-ruleset"

[control]
; Names for custom tech flags. There can be up to 8 of these.
; name          = rule name; In some circumstances user may see this
;                 as part of some sentences, so try to make it descriptive
;                 and sensible.
; helptxt       = displayed in the help for advances with this flag (optional)
;flags =
;  { "name", "helptxt"
;  }

; /* <-- avoid gettext warnings
;
; Below: The individual advances, one per section.
; The number can be variable, up to 196.
;
; The actual tag used (the * in [advance_*]) does not matter, except 
; it must be unique within this file, and it may be used in debug 
; output when reading this file.
;
; Notes:
;
; name          = translatable name as seen by user
; rule_name     = (optional) name for savegames, rulesets etc; if not
;                 present, 'name' is used. Since the name used in savegames
;                 must not change, use this when renaming a tech after a
;                 ruleset has been released.
; req1, req2	= advances required before researching this one
; root_req      = tech required before acquiring this tech, by any
;     means, inherited by all techs that require this tech in turn unless
;     "None" is given here explicitly; and you can make a tech available
;     only through the init_tech of a nation by making it root_req itself.
; flags         = special flag strings
; graphic       = icon for technology
; graphic_alt   = alternate icon
; helptext	= optional help text string (set units ruleset for examples)
; bonus_message = text seen when a player is the first to discover
;                 an bonus tech. Must contain '%s' to mark place of the tech
;                 gained.
; cost          = if tech_cost_style is set to 2, this field is read for
;                 information on how much a tech costs
;
; Special values for req1 and req2 are "None" (first section below) 
; and "Never" (never available).  If only one tech is required, 
; it should be listed as req1.
;
; As well as custom flags defined above, the following flag strings are
; possible:
;
; "Bonus_Tech" = player gets extra tech if reached first
; "Bridge"   = "Settler" unit types can build roads with "RequiresBridge" flag
;              over roads with "PreventsOtherRoads" flag (rivers)
; "Build_Airborne" = from now on can build air units (for use by AI)
; "Claim_Ocean"    = Player claims ocean tiles even if they are not
;                    adjacent to border source
; "Claim_Ocean_Limited" = Oceanic border sources claim ocean tiles even if
;                         they are not adjacent to border source
;
; */ <-- avoid gettext warnings

[advance_advanced_flight]
name     = _("Advanced Flight")
req1     = "Radio"
req2     = "Machine Tools"
flags    = ""
graphic     = "a.advanced_flight"
graphic_alt = "-"

[advance_alphabet]
name     = _("Alphabet")
req1     = "None"
req2     = "None"
flags    = ""
graphic     = "a.alphabet"
graphic_alt = "-"

[advance_amphibious_warfare]
name     = _("Amphibious Warfare")
req1     = "Navigation"
req2     = "Tactics"
flags    = ""
graphic     = "a.amphibious_warfare"
graphic_alt = "-"

[advance_astronomy]
name     = _("Astronomy")
req1     = "Mysticism"
req2     = "Mathematics"
flags    = ""
graphic     = "a.astronomy"
graphic_alt = "-"

[advance_atomic_theory]
name     = _("Atomic Theory")
req1     = "Scientific Method"
req2     = "Physics"
flags    = ""
graphic     = "a.atomic_theory"
graphic_alt = "-"

[advance_automobile]
name     = _("Automobile")
req1     = "Combustion"
req2     = "Steel"
flags    = ""
graphic     = "a.automobile"
graphic_alt = "-"
helptext = _("Increases the population's contribution to pollution.")

[advance_aviation]
name     = _("Aviation")
req1     = "Advanced Flight"
req2     = "Radar"
flags    = ""
graphic     = "a.aviation"
graphic_alt = "-"

[advance_banking]
name     = _("Banking")
req1     = "Trade"
req2     = "The Republic"
flags    = ""
graphic     = "a.banking"
graphic_alt = "-"

[advance_bridge_building]
name     = _("Bridge Building")
req1     = "Iron Working"
req2     = "Construction"
flags    = "Bridge"
graphic     = "a.bridge_building"
graphic_alt = "-"
helptext = _("Allows roads to be built on river tiles.")

[advance_bronze_working]
name     = _("Bronze Working")
req1     = "None"
req2     = "None"
flags    = ""
graphic     = "a.bronze_working"
graphic_alt = "-"

[advance_ceremonial_burial]
name     = _("Ceremonial Burial")
req1     = "None"
req2     = "None"
flags    = ""
graphic     = "a.ceremonial_burial"
graphic_alt = "-"

[advance_chemistry]
name     = _("Chemistry")
req1     = "University"
req2     = "Medicine"
flags    = ""
graphic     = "a.chemistry"
graphic_alt = "-"

[advance_clock]
name     = _("Clock")
req1     = "Railroad"
req2     = "None"
flags    = ""
graphic     = "a.clock"
graphic_alt = "-"
helptext = _("Increases gold output by 15%.")

[advance_chivalry]
name     = _("Chivalry")
req1     = "Feudalism"
req2     = "Horseback Riding"
flags    = ""
graphic     = "a.chivalry"
graphic_alt = "-"

[advance_code_of_laws]
name     = _("Code of Laws")
req1     = "Alphabet"
req2     = "None"
flags    = ""
graphic     = "a.code_of_laws"
graphic_alt = "-"

[advance_combined_arms]
name     = _("Combined Arms")
req1     = "Mobile Warfare"
req2     = "Advanced Flight"
flags    = ""
graphic     = "a.combined_arms"
graphic_alt = "-"

[advance_combustion]
name     = _("Combustion")
req1     = "Refining"
req2     = "Explosives"
flags    = ""
graphic     = "a.combustion"
graphic_alt = "-"

[advance_communism]
name     = _("Communism")
req1     = "Philosophy"
req2     = "Industrialization"
flags    = ""
graphic     = "a.communism"
graphic_alt = "-"

[advance_computers]
name     = _("Computers")
req1     = "Mass Production"
req2     = "Miniaturization"
flags    = ""
graphic     = "a.computers"
graphic_alt = "-"

[advance_conscription]
name     = _("Conscription")
req1     = "Democracy"
req2     = "Metallurgy"
flags    = ""
graphic     = "a.conscription"
graphic_alt = "-"

[advance_construction]
name     = _("Construction")
req1     = "Masonry"
req2     = "Currency"
flags    = ""
graphic     = "a.construction"
graphic_alt = "-"
helptext = _("Allows Settlers, Workers and Engineers to build fortresses.")

[advance_currency]
name     = _("Currency")
req1     = "Bronze Working"
req2     = "None"
flags    = ""
graphic     = "a.currency"
graphic_alt = "-"

[advance_cybernetics]
name     = _("Cybernetics")
req1     = "Genetic Engineering"
req2     = "Robotics"
flags    = ""
graphic     = "a.cybernetics"
graphic_alt = "-"

[advance_democracy]
name     = _("Democracy")
req1     = "Banking"
req2     = "Invention"
flags    = ""
graphic     = "a.democracy"
graphic_alt = "-"

[advance_economics]
name     = _("Economics")
req1     = "Banking"
req2     = "University"
flags    = ""
graphic     = "a.economics"
graphic_alt = "-"

[advance_electricity]
name     = _("Electricity")
req1     = "Metallurgy"
req2     = "Magnetism"
flags    = ""
graphic     = "a.electricity"
graphic_alt = "-"
helptext = _("Improves the effect of Colosseums.")

[advance_electronics]
name     = _("Electronics")
req1     = "The Corporation"
req2     = "Electricity"
flags    = ""
graphic     = "a.electronics"
graphic_alt = "-"

[advance_engineering]
name     = _("Engineering")
req1     = "The Wheel"
req2     = "Construction"
flags    = ""
graphic     = "a.engineering"
graphic_alt = "-"

[advance_environmentalism]
name     = _("Environmentalism")
req1     = "Recycling"
req2     = "Space Flight"
flags    = ""
graphic     = "a.environmentalism"
graphic_alt = "-"
helptext    = _("Knowing this tech reduces pollution by 10%.")

[advance_espionage]
name     = _("Espionage")
req1     = "Communism"
req2     = "Democracy"
flags    = ""
graphic     = "a.espionage"
graphic_alt = "-"

[advance_explosives]
name     = _("Explosives")
req1     = "Gunpowder"
req2     = "Chemistry"
flags    = ""
graphic     = "a.explosives"
graphic_alt = "-"

[advance_feudalism]
name     = _("Feudalism")
req1     = "Warrior Code"
req2     = "Monarchy"
flags    = ""
graphic     = "a.feudalism"
graphic_alt = "-"

[advance_flight]
name     = _("Flight")
req1     = "Combustion"
req2     = "Theory of Gravity"
flags    = "Build_Airborne"
graphic     = "a.flight"
graphic_alt = "-"
helptext = _("Decreases one-time revenue from new trade routes.")

[advance_fundamentalism]
name        = _("Fundamentalism")
req1        = "Theology"
req2        = "Leadership"
flags       = ""
graphic     = "a.fundamentalism"
graphic_alt = "-"

[advance_fusion_power]
name     = _("Fusion Power")
req1     = "Nuclear Power"
req2     = "Superconductors"
flags    = ""
graphic     = "a.fusion_power"
graphic_alt = "-"

[advance_genetic_engineering]
name     = _("Genetic Engineering")
req1     = "Medicine"
req2     = "The Corporation"
flags    = ""
graphic     = "a.genetic_engineering"
graphic_alt = "-"

[advance_guerilla_warfare]
name     = _("Guerilla Warfare")
req1     = "Communism"
req2     = "Tactics"
flags    = ""
graphic     = "a.guerilla_warfare"
graphic_alt = "-"

[advance_guild_system]
name        = _("Guild System")
req1        = "Iron Working"
req2        = "None"
flags       = ""
graphic     = "a.guilds"
graphic_alt = "-"

[advance_gunpowder]
name     = _("Gunpowder")
req1     = "Invention"
req2     = "Guild System"
flags    = ""
graphic     = "a.gunpowder"
graphic_alt = "-"

[advance_horseback_riding]
name     = _("Horseback Riding")
req1     = "None"
req2     = "None"
flags    = ""
graphic     = "a.horseback_riding"
graphic_alt = "-"

[advance_industrialization]
name     = _("Industrialization")
req1     = "Clock"
req2     = "Banking"
flags    = ""
graphic     = "a.industrialization"
graphic_alt = "-"
helptext = _("Increases the population's contribution to pollution.")

[advance_invention]
name     = _("Invention")
req1     = "Engineering"
req2     = "Literacy"
flags    = ""
graphic     = "a.invention"
graphic_alt = "-"

[advance_iron_working]
name     = _("Iron Working")
req1     = "Bronze Working"
req2     = "Warrior Code"
flags    = ""
graphic     = "a.iron_working"
graphic_alt = "-"

[advance_labor_union]
name     = _("Labor Union")
req1     = "Mass Production"
req2     = "Guerilla Warfare"
flags    = ""
graphic     = "a.labor_union"
graphic_alt = "-"

[advance_laser]
name     = _("Laser")
req1     = "Mass Production"
req2     = "Nuclear Power"
flags    = ""
graphic     = "a.laser"
graphic_alt = "-"

[advance_leadership]
name     = _("Leadership")
req1     = "Chivalry"
req2     = "Gunpowder"
flags    = ""
graphic     = "a.leadership"
graphic_alt = "-"

[advance_literacy]
name     = _("Literacy")
req1     = "Writing"
req2     = "Code of Laws"
flags    = ""
graphic     = "a.literacy"
graphic_alt = "-"

[advance_machine_tools]
name     = _("Machine Tools")
req1     = "Steel"
req2     = "Tactics"
flags    = ""
graphic     = "a.machine_tools"
graphic_alt = "-"

[advance_magnetism]
name     = _("Magnetism")
req1     = "Iron Working"
req2     = "Navigation"
flags    = ""
graphic     = "a.magnetism"
graphic_alt = "-"
helptext    = _("Allows establishing one more trade route from each city.")

[advance_map_making]
name     = _("Map Making")
req1     = "Alphabet"
req2     = "None"
flags    = ""
graphic     = "a.map_making"
graphic_alt = "-"

[advance_masonry]
name     = _("Masonry")
req1     = "None"
req2     = "None"
flags    = ""
graphic     = "a.masonry"
graphic_alt = "-"

[advance_mass_production]
name     = _("Mass Production")
req1     = "Automobile"
req2     = "The Corporation"
flags    = ""
graphic     = "a.mass_production"
graphic_alt = "-"
helptext = _("Increases the population's contribution to pollution.")

[advance_mathematics]
name     = _("Mathematics")
req1     = "Alphabet"
req2     = "Masonry"
flags    = ""
graphic     = "a.mathematics"
graphic_alt = "-"

[advance_medicine]
name     = _("Medicine")
req1     = "Philosophy"
req2     = "Trade"
flags    = ""
graphic     = "a.medicine"
graphic_alt = "-"

[advance_metallurgy]
name     = _("Metallurgy")
req1     = "Gunpowder"
req2     = "University"
flags    = ""
graphic     = "a.metallurgy"
graphic_alt = "-"

[advance_miniaturization]
name     = _("Miniaturization")
req1     = "Machine Tools"
req2     = "Electronics"
flags    = ""
graphic     = "a.miniaturization"
graphic_alt = "-"

[advance_mobile_warfare]
name     = _("Mobile Warfare")
req1     = "Automobile"
req2     = "Tactics"
flags    = ""
graphic     = "a.mobile_warfare"
graphic_alt = "-"

[advance_monarchy]
name     = _("Monarchy")
req1     = "Code of Laws"
req2     = "None"
flags    = ""
graphic     = "a.monarchy"
graphic_alt = "-"

[advance_monotheism]
name     = _("Monotheism")
req1     = "Philosophy"
req2     = "Polytheism"
flags    = ""
graphic     = "a.monotheism"
graphic_alt = "-"

[advance_mysticism]
name     = _("Mysticism")
req1     = "Ceremonial Burial"
req2     = "None"
flags    = ""
graphic     = "a.mysticism"
graphic_alt = "-"
helptext = _("Improves the effect of Temples.")

[advance_naval_border_control]
name        = _("Naval Border Control")
req1        = "Ocean Adaptation"
req2        = "Flight"
flags       = "Claim_Ocean_Limited"
graphic     = "a.naval_border_control"
graphic_alt = "-"
helptext    = _("\
Oceanic cities can claim ocean borders like land cities land borders.\
")

[advance_navigation]
name     = _("Navigation")
req1     = "Seafaring"
req2     = "Astronomy"
flags    = ""
graphic     = "a.navigation"
graphic_alt = "-"

[advance_nuclear_fission]
name     = _("Nuclear Fission")
req1     = "Mass Production"
req2     = "Atomic Theory"
flags    = ""
graphic     = "a.nuclear_fission"
graphic_alt = "-"

[advance_nuclear_power]
name     = _("Nuclear Power")
req1     = "Nuclear Fission"
req2     = "Electronics"
flags    = ""
graphic     = "a.nuclear_power"
graphic_alt = "-"
helptext = _("Gives sea, but not trireme, units one extra move.")

[advance_nuclear_weapons]
name     = _("Nuclear Weapons")
req1     = "Nuclear Fission"
req2     = "Rocketry"
flags    = ""
graphic     = "a.nuclear_weapons"
graphic_alt = "-"

[advance_ocean_adapt]
name        = _("Ocean Adaptation")
req1        = "Genetic Engineering"
req2        = "Amphibious Warfare"
graphic     = "a.ocean_adapt"
graphic_alt = "-"
helptext    = _("Knowing this tech makes it possible for city workers to work on \
Deep Ocean tiles.")

[advance_orbital_flight]
name        = _("Orbital Flight")
req1        = "Rocketry"
req2        = "Television"
flags       = ""
graphic     = "a.orbital_flight"
graphic_alt = "-"

[advance_philosophy]
name     = _("Philosophy")
req1     = "Mysticism"
req2     = "Literacy"
flags    = "Bonus_Tech"
bonus_message = _("Great philosophers from all the world join \
your civilization: you learn %s immediately.")
graphic     = "a.philosophy"
graphic_alt = "-"

[advance_physics]
name     = _("Physics")
req1     = "Literacy"
req2     = "Navigation"
flags    = ""
graphic     = "a.physics"
graphic_alt = "-"

[advance_plastics]
name     = _("Plastics")
req1     = "Refining"
req2     = "Space Flight"
flags    = ""
graphic     = "a.plastics"
graphic_alt = "-"
helptext = _("Increases the population's contribution to pollution.")

[advance_polytheism]
name     = _("Polytheism")
req1     = "Horseback Riding"
req2     = "Ceremonial Burial"
flags    = ""
graphic     = "a.polytheism"
graphic_alt = "-"

[advance_pottery]
name     = _("Pottery")
req1     = "None"
req2     = "None"
flags    = ""
graphic     = "a.pottery"
graphic_alt = "-"

[advance_radar]
name     = _("Radar")
req1     = "Radio"
req2     = "None"
flags    = ""
graphic     = "a.radar"
graphic_alt = "-"
helptext    = _("\
Allows Worker type units to build buoys on sea tiles.\n\n\
Land units in fortresses have vision range sq increased to 8.\n\n\
Radar increases city vision radius. On hex maps cities can see \
one tile further. On square maps square if the city vision radius \
is increased by one.\
")

[advance_radio]
name     = _("Radio")
req1     = "Flight"
req2     = "Electricity"
flags    = ""
graphic     = "a.radio"
graphic_alt = "-"
helptext    = _("\
Allows Worker type units to build airbases.")

[advance_railroad]
name     = _("?tech:Railroad")
req1     = "Steam Engine"
req2     = "Bridge Building"
flags    = ""
graphic     = "a.railroad"
graphic_alt = "-"
helptext = _("\
Allows Settlers, Workers and Engineers to upgrade roads to railroads.\
"), _("\
Decreases one-time revenue from new trade routes.\
")

[advance_recycling]
name     = _("Recycling")
req1     = "Mass Production"
req2     = "Democracy"
flags    = ""
graphic     = "a.recycling"
graphic_alt = "-"

[advance_refining]
name     = _("Refining")
req1     = "Chemistry"
req2     = "The Corporation"
flags    = ""
graphic     = "a.refining"
graphic_alt = "-"

[advance_refrigeration]
name     = _("Refrigeration")
req1     = "Sanitation"
req2     = "Electricity"
flags    = ""
graphic     = "a.refrigeration"
graphic_alt = "-"
helptext = _("\
Allows Settlers, Workers and Engineers to upgrade irrigation systems \
to farmland.\
")

[advance_robotics]
name     = _("Robotics")
req1     = "Mobile Warfare"
req2     = "Computers"
flags    = ""
graphic     = "a.robotics"
graphic_alt = "-"

[advance_rocketry]
name     = _("Rocketry")
req1     = "Advanced Flight"
req2     = "Electronics"
flags    = ""
graphic     = "a.rocketry"
graphic_alt = "-"

[advance_sanitation]
name     = _("Sanitation")
req1     = "Engineering"
req2     = "Medicine"
flags    = ""
graphic     = "a.sanitation"
graphic_alt = "-"

[advance_scientific_method]
name     = _("Scientific Method")
req1     = "Theory of Gravity"
req2     = "Chemistry"
flags    = ""
graphic     = "a.scientific_method"
graphic_alt = "-"
helptext    = _("Doubles scientist productivity. Each of them produces 2 bulbs more when
Scientific Method is known.\n\n\
Also increases other science output by 10% in all cities, \
30% in cities with university.")

[advance_seafaring]
name     = _("Seafaring")
req1     = "Pottery"
req2     = "Map Making"
flags    = ""
graphic     = "a.seafaring"
graphic_alt = "-"

[advance_solar_power]
name        = _("Solar Power")
req1        = "Environmentalism"
req2        = "None"
flags       = ""
graphic     = "a.solar_power"
graphic_alt = "-"

[advance_space_flight]
name     = _("Space Flight")
req1     = "Computers"
req2     = "Orbital Flight"
flags    = ""
graphic     = "a.space_flight"
graphic_alt = "-"
helptext    = _("Airports can airlift two units each turn.")

[advance_stealth]
name     = _("Stealth")
req1     = "Superconductors"
req2     = "Aviation"
flags    = ""
graphic     = "a.stealth"
graphic_alt = "-"

[advance_steam_engine]
name     = _("Steam Engine")
req1     = "Thermodynamics"
req2     = "Invention"
flags    = ""
graphic     = "a.steam_engine"
graphic_alt = "-"
helptext = _("Increases the population's contribution to pollution.")

[advance_steel]
name     = _("Steel")
req1     = "Electricity"
req2     = "Industrialization"
flags    = ""
graphic     = "a.steel"
graphic_alt = "-"

[advance_superconductors]
name     = _("Superconductors")
req1     = "Nuclear Power"
req2     = "Laser"
flags    = ""
graphic     = "a.superconductors"
graphic_alt = "-"

[advance_tactics]
name     = _("Tactics")
req1     = "Conscription"
req2     = "Leadership"
flags    = ""
graphic     = "a.tactics"
graphic_alt = "-"

[advance_television]
name     = _("Television")
req1     = "Radio"
req2     = "None"
flags    = ""
graphic     = "a.television"
graphic_alt = "-"

[advance_the_corporation]
name     = _("The Corporation")
req1     = "Economics"
req2     = "Industrialization"
flags    = ""
graphic     = "a.the_corporation"
graphic_alt = "-"
helptext    = _("\
* Makes taxmen more productive. Each of them produces one more gold.\n\
* Allows establishing one more trade route from each city.")

[advance_the_republic]
name     = _("The Republic")
req1     = "Code of Laws"
req2     = "Literacy"
flags    = ""
graphic     = "a.the_republic"
graphic_alt = "-"

[advance_the_wheel]
name     = _("The Wheel")
req1     = "Horseback Riding"
req2     = "None"
flags    = ""
graphic     = "a.the_wheel"
graphic_alt = "-"

[advance_thermodynamics]
name     = _("Thermodynamics")
req1     = "Physics"
req2     = "None"
flags    = ""
graphic     = "a.thermodynamics"
graphic_alt = "-"

[advance_theology]
name     = _("Theology")
req1     = "Feudalism"
req2     = "Monotheism"
flags    = ""
graphic     = "a.theology"
graphic_alt = "-"
helptext = _("Improves the effect of Cathedrals.")

[advance_theory_of_gravity]
name     = _("Theory of Gravity")
req1     = "Astronomy"
req2     = "University"
flags    = ""
graphic     = "a.theory_of_gravity"
graphic_alt = "-"

[advance_trade]
name     = _("Trade")
req1     = "Currency"
req2     = "Code of Laws"
flags    = ""
graphic     = "a.trade"
graphic_alt = "-"

[advance_university]
name     = _("University")
req1     = "Astronomy"
req2     = "Philosophy"
flags    = ""
graphic     = "a.university"
graphic_alt = "-"

[advance_warrior_code]
name     = _("Warrior Code")
req1     = "None"
req2     = "None"
flags    = ""
graphic     = "a.warrior_code"
graphic_alt = "-"

[advance_writing]
name     = _("Writing")
req1     = "Alphabet"
req2     = "None"
flags    = ""
graphic     = "a.writing"
graphic_alt = "-"