diff --git a/asterix-external-data/src/test/resources/data/countriesCapitals.txt b/asterix-external-data/src/test/resources/data/countriesCapitals.txt
new file mode 100644
index 0000000..def17ed
--- /dev/null
+++ b/asterix-external-data/src/test/resources/data/countriesCapitals.txt
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+United\ Arab\ Emirates=Abu Dhabi
+Nigeria=Abuja
+Ghana=Accra
+Ethiopia=Addis Ababa
+Algeria=Algiers
+Niue=Alofi
+Jordan=Amman
+Netherlands=Amsterdam 
+Andorra=Andorra la Vella
+Turkey=Ankara
+Madagascar=Antananarivo
+Samoa=Apia
+Turkmenistan=Ashgabat
+Eritrea=Asmara
+Kazakhstan=Astana
+Paraguay=Asunción
+Greece=Athens
+Iraq=Baghdad
+Azerbaijan=Baku
+Mali=Bamako
+Brunei=Bandar Seri Begawan
+Thailand=Bangkok
+Gambia=Banjul
+China=Beijing
+Lebanon=Beirut
+Serbia=Belgrade
+Belize=Belmopan
+Germany=Berlin
+Switzerland=Bern
+Kyrgyzstan=Bishkek
+Guinea-Bissau=Bissau
+Colombia=Bogotá
+Brazil=Brasília
+Slovakia=Bratislava
+Barbados=Bridgetown
+Belgium=Brussels
+Romania=Bucharest
+Hungary=Budapest
+Argentina=Buenos Aires
+Burundi=Bujumbura
+Egypt=Cairo
+Australia=Canberra
+Venezuela=Caracas
+Wales=Cardiff
+Moldova=Chisinau
+Guinea=Conakry
+Denmark=Copenhagen
+Senegal=Dakar
+Syria=Damascus
+Bangladesh=Dhaka
+Djibouti=Djibouti
+Qatar=Doha
+Ireland=Dublin
+Tajikistan=Dushanbe
+Scotland=Edinburgh
+Botswana=Gaborone
+Guyana=Georgetown
+Gibraltar=Gibraltar
+Guatemala=Guatemala City
+Guam=Hagåtña
+Bermuda=Hamilton
+Vietnam=Hanoi
+Zimbabwe=Harare
+Cuba=Havana
+Finland=Helsinki
+Pakistan=Islamabad
+Indonesia=Jakarta
+Afghanistan=Kabul
+Uganda=Kampala
+Nepal=Kathmandu
+Sudan=Khartoum
+Ukraine=Kiev
+Rwanda=Kigali
+Jamaica=Kingston
+Malaysia=Kuala Lumpur
+Kuwait=Kuwait City
+Gabon=Libreville
+Malawi=Lilongwe
+Peru=Lima
+Portugal=Lisbon
+Slovenia=Ljubljana
+Togo=Lome
+England=London
+Angola=Luanda
+Zambia=Lusaka
+Luxembourg=Luxembourg
+Spain=Madrid
+Marshall Islands=Majuro
+Equatorial Guinea=Malabo
+Maldives=Malé
+Nicaragua=Managua
+Bahrain=Manama
+Philippines=Manila
+Mozambique=Maputo
+Saint Martin=Marigot
+Lesotho=Maseru
+Wallis and Futuna=Mata-Utu
+Palau=Melekeok
+Mexico=Mexico City
+Belarus=Minsk
+Somalia=Mogadishu
+Monaco=Monaco
+Liberia=Monrovia
+Uruguay=Montevideo
+Comoros=Moroni
+Russia=Moscow
+Oman=Muscat
+Kenya=Nairobi
+Bahamas=Nassau
+Myanmar=Naypyidaw
+Chad=NDjamena
+India=New Delhi
+Niger=Niamey
+Cyprus=Nicosia
+Mauritania=Nouakchott
+Greenland=Nuuk
+Aruba=Oranjestad
+Norway=Oslo
+Canada=Ottawa
+Panama=Panama City
+Suriname=Paramaribo
+France=Paris
+Cambodia=Phnom Penh
+Montserrat=Brades Estate (de facto)
+Montenegro=Podgorica
+Mauritius=Port Louis
+Vanuatu=Port Vila
+Haiti=Port-au-Prince
+Benin=Cotonou (de facto)
+Czech Republic=Prague
+Cape Verde=Praia
+South\ Africa=Cape Town
+North\ Korea=Pyongyang
+Ecuador=Quito
+Morocco=Rabat
+Iceland=Reykjavík
+Latvia=Riga
+Saudi\ Arabia=Riyadh
+Italy=Rome
+Dominica=Roseau
+Costa\ Rica=San José
+Puerto\ Rico=San Juan
+San\ Marino=San Marino
+El\ Salvador=San Salvador
+Yemen=Sanaa
+Chile=Santiago
+Dominican\ Republic=Santo Domingo
+Bosnia\ and\ Herzegovina=Sarajevo
+South\ Korea=Seoul
+Singapore=Singapore
+Macedonia=Skopje
+Bulgaria=Sofia
+Sri\ Lanka=Colombo
+Grenada=St. George's
+Jersey=St. Helier
+Guernsey=St. Peter Port
+Sweden=Stockholm
+Bolivia=La Paz
+Abkhazia=Sukhumi
+Fiji=Suva
+Taiwan=Taipei
+Estonia=Tallinn
+Kiribati=Tarawa
+Uzbekistan=Tashkent
+Georgia=Tbilisi
+Honduras=Tegucigalpa
+Iran=Tehran
+Bhutan=Thimphu
+Albania=Tirana
+Transnistria=Tiraspol
+Japan=Tokyo
+Libya=Tripoli
+Tunisia=Tunis
+Mongolia=Ulan Bator
+Liechtenstein=Vaduz
+Malta=Valletta
+Anguilla=The Valley
+Vatican\ City=Vatican City
+Seychelles=Victoria
+Austria=Vienna
+Laos=Vientiane
+Lithuania=Vilnius
+Poland=Warsaw
+United\ States=Washington D.C.
+New\ Zealand=Wellington
+Namibia=Windhoek
+Nauru=Yaren (de facto)
+Armenia=Yerevan
+Croatia=Zagreb