| *COUNTRY ID* | IDCNTRY | NUMERIC | - | | | Nominal |
| *COUNTRY ISO CODE* | COUNTRY | CHARACTER | - | | | Scale |
| *STUDENT ID* | IDSTUD | NUMERIC | - | | | Scale |
| *CLASS ID* | IDCLASS | NUMERIC | - | | | Nominal |
| *SCHOOL ID* | IDSCHOOL | NUMERIC | - | | | Nominal |
| EXPECTED FURTHER EDUCATION | IS2G03 | NUMERIC | - | | | Nominal |
| COUNTRY OF BIRTH-STUDENT | IS2G04A | NUMERIC | - | | | Nominal |
| COUNTRY OF BIRTH-MOTHER | IS2G04B | NUMERIC | - | | | Nominal |
| COUNTRY OF BIRTH-FATHER | IS2G04C | NUMERIC | - | | | Nominal |
| LANGUAGE BACKGROUND | IS2G05 | NUMERIC | - | | | Nominal |
| HIGHEST LEVEL OF EDUCATION MOTHER | IS2G07 | NUMERIC | - | | | Nominal |
| HIGHEST LEVEL OF EDUCATION FATHER | IS2G09 | NUMERIC | - | | | Nominal |
| INTEREST-MOTHER | IS2G10A | NUMERIC | - | | | Nominal |
| INTEREST-FATHER | IS2G10B | NUMERIC | - | | | Nominal |
| BOOKS AT HOME | IS2G11 | NUMERIC | - | | | Nominal |
| LIVING AT HOME-MOTHER | IS2G11A | NUMERIC | - | | | Nominal |
| LIVING AT HOME-FEMALE GUARDIAN | IS2G11B | NUMERIC | - | | | Nominal |
| LIVING AT HOME-FATHER | IS2G11C | NUMERIC | - | | | Nominal |
| LIVING AT HOME-MALE GUARDIAN | IS2G11D | NUMERIC | - | | | Nominal |
| LIVING AT HOME-SIBLINGS | IS2G11E | NUMERIC | - | | | Nominal |
| LIVING AT HOME-GRANDPARENTS | IS2G11F | NUMERIC | - | | | Nominal |
| LIVING AT HOME-OTHERS | IS2G11G | NUMERIC | - | | | Nominal |
| ACTIVITIES-TELEVISION VIDEOS OR DVDS | IS2G12A | NUMERIC | - | | | Nominal |
| ACTIVITIES-HOMEWORK STUDY FOR SCHOOL | IS2G12B | NUMERIC | - | | | Nominal |
| ACTIVITIES-COMPUTER OR INTERNET | IS2G12C | NUMERIC | - | | | Nominal |
| ACTIVITIES-READING FOR ENJOYMENT | IS2G12D | NUMERIC | - | | | Nominal |
| ACTIVITIES-TALK FRIENDS PHONE INTERNET | IS2G12E | NUMERIC | - | | | Nominal |
| ACTIVITIES-SPEND TIME WITH FRIENDS | IS2G12F | NUMERIC | - | | | Nominal |
| ACTIVITIES-TALKING WITH PARENTS-ISSUES | IS2G13A | NUMERIC | - | | | Nominal |
| ACTIVITIES-WATCHING THE NEWS ON TV | IS2G13B | NUMERIC | - | | | Nominal |
| ACTIVITIES-READING NEWSPAPER | IS2G13C | NUMERIC | - | | | Nominal |
| ACTIVITIES-TALKING WITH FRIENDS-ISSUES | IS2G13D | NUMERIC | - | | | Nominal |
| ACTIVITIES-USING THE INTERNET | IS2G13E | NUMERIC | - | | | Nominal |
| ACTIVITIES-TALKING W PARENTS-COUNTRIES | IS2G13F | NUMERIC | - | | | Nominal |
| ACTIVITIES-TALKING W FRIENDS-COUNTRIES | IS2G13G | NUMERIC | - | | | Nominal |
| ACTIVITIES-SPECIAL INTEREST GROUP | IS2G13H | NUMERIC | - | | | Nominal |
| PARTICIPATION-YOUTH ORGANISATION | IS2P14A | NUMERIC | - | | | Nominal |
| PARTICIPATION-ENVIRONMENTAL ORGANISATION | IS2P14B | NUMERIC | - | | | Nominal |
| PARTICIPATION-HUMAN RIGHTS ORGANISATION | IS2P14C | NUMERIC | - | | | Nominal |
| PARTICIPATION-VOLUNTARY GROUP COMMUNITY | IS2P14D | NUMERIC | - | | | Nominal |
| PARTICIPATION-ORGANISATION COLLECT MONEY | IS2P14E | NUMERIC | - | | | Nominal |
| PARTICIPATION-CULTURAL ORGANISATION | IS2P14F | NUMERIC | - | | | Nominal |
| PARTICIPATION-RELIGIOUS GROUP | IS2P14G | NUMERIC | - | | | Nominal |
| PARTICIPATION-YOUNG PEOPLE CAMPAIGNING | IS2P14H | NUMERIC | - | | | Nominal |
| PARTICIPATION SCHOOL-VOLUNTARY ACTIVITY | IS2G15A | NUMERIC | - | | | Nominal |
| PARTICIPATION SCHOOL-DEBATE | IS2G15B | NUMERIC | - | | | Nominal |
| PARTICIPATION SCHOOL-VOTING | IS2G15C | NUMERIC | - | | | Nominal |
| PARTICIPATION SCHOOL-DECISION-MAKING | IS2G15D | NUMERIC | - | | | Nominal |
| PARTICIPATION SCHOOL-DISCUSSIONS | IS2G15E | NUMERIC | - | | | Nominal |
| PARTICIPATION SCHOOL-CANDIDATE | IS2G15F | NUMERIC | - | | | Nominal |
| REGULAR LESSON-DISAGREE OPENLY | IS2G16A | NUMERIC | - | | | Nominal |
| REGULAR LESSON-MAKE UP OWN MINDS | IS2G16B | NUMERIC | - | | | Nominal |
| REGULAR LESSON-EXPRESS OPINIONS | IS2G16C | NUMERIC | - | | | Nominal |
| REGULAR LESSON-EVENTS FOR DISCUSSION | IS2G16D | NUMERIC | - | | | Nominal |
| REGULAR LESSON-DIFFERENT OPINIONS | IS2G16E | NUMERIC | - | | | Nominal |
| REGULAR LESSON-DISCUSS DIFFERENT OPINION | IS2G16F | NUMERIC | - | | | Nominal |
| REGULAR LESSON-SEVERAL SIDES | IS2G16G | NUMERIC | - | | | Nominal |
| OPINION-WAY CLASSES ARE TAUGHT | IS2G17A | NUMERIC | - | | | Nominal |
| OPINION-WHAT IS TAUGHT IN CLASSES | IS2G17B | NUMERIC | - | | | Nominal |
| OPINION-TEACHING-LEARNING MATERIALS | IS2G17C | NUMERIC | - | | | Nominal |
| OPINION-TIMETABLE | IS2G17D | NUMERIC | - | | | Nominal |
| OPINION-CLASSROOM RULES | IS2G17E | NUMERIC | - | | | Nominal |
| OPINION-SCHOOL RULES | IS2G17F | NUMERIC | - | | | Nominal |
| OPINION-<EXTRA CURRICULAR ACTIVITIES> | IS2G17G | NUMERIC | - | | | Nominal |
| AGREE-TEACHERS TREAT FAIRLY | IS2G18A | NUMERIC | - | | | Nominal |
| AGREE-GET ALONG WELL WITH MOST TEACHERS | IS2G18B | NUMERIC | - | | | Nominal |
| AGREE-TEACHERS INTERESTED | IS2G18C | NUMERIC | - | | | Nominal |
| AGREE-OUTSIDER AT SCHOOL | IS2G18D | NUMERIC | - | | | Nominal |
| AGREE-TEACHERS REALLY LISTEN | IS2G18E | NUMERIC | - | | | Nominal |
| AGREE-RECEIVE EXTRA HELP FROM TEACHERS | IS2G18F | NUMERIC | - | | | Nominal |
| AGREE-BULLIED BY OTHER STUDENTS | IS2G18G | NUMERIC | - | | | Nominal |
| PARTICIPATION-CAN MAKE SCHOOLS BETTER | IS2P19A | NUMERIC | - | | | Nominal |
| PARTICIPATION-STUDENTS WORK TOGETHER | IS2P19B | NUMERIC | - | | | Nominal |
| PARTICIPATION-ORGANISING GROUPS | IS2P19C | NUMERIC | - | | | Nominal |
| PARTICIPATION-SCHOOL PARLIAMENT | IS2P19D | NUMERIC | - | | | Nominal |
| PARTICIPATION-MORE INFLUENCE TOGETHER | IS2P19E | NUMERIC | - | | | Nominal |
| DEMOCRACY-EXPRESS OPINIONS FREELY | IS2P20A | NUMERIC | - | | | Nominal |
| DEMOCRACY-GOVERNMENT JOBS | IS2P20B | NUMERIC | - | | | Nominal |
| DEMOCRACY-OWN ALL NEWSPAPERS | IS2P20C | NUMERIC | - | | | Nominal |
| DEMOCRACY-JAIL WITHOUT TRIAL | IS2P20D | NUMERIC | - | | | Nominal |
| DEMOCRACY-POLITICAL RIGHTS RESPECTED | IS2P20E | NUMERIC | - | | | Nominal |
| DEMOCRACY-CRITICISE GOVERNMENT PUBLICLY | IS2P20F | NUMERIC | - | | | Nominal |
| DEMOCRACY-CHECK LETTER PHONE EMAIL | IS2P20G | NUMERIC | - | | | Nominal |
| DEMOCRACY-ELECT LEADERS FREELY | IS2P20H | NUMERIC | - | | | Nominal |
| DEMOCRACY-PROTEST IF LAW IS UNFAIR | IS2P20I | NUMERIC | - | | | Nominal |
| DEMOCRACY-PROTEST NEVER VIOLENT | IS2P20J | NUMERIC | - | | | Nominal |
| DEMOCRACY-DIFFERENCES IN INCOME | IS2P20K | NUMERIC | - | | | Nominal |
| DEMOCRACY-CONTROL MEDIA | IS2P20L | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-VOTING IN EVERY ELECTION | IS2P21A | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-JOINING POLITICAL PARTY | IS2P21B | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-LEARNING COUNTRY HISTORY | IS2P21C | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-FOLLOWING ISSUES IN MEDIA | IS2P21D | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-RESPECT FOR REPRESENTATIVES | IS2P21E | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-POLITICAL DISCUSSIONS | IS2P21F | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-PEACEFUL PROTEST | IS2P21G | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-BENEFIT PEOPLE IN COMMUNITY | IS2P21H | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-PROMOTING HUMAN RIGHTS | IS2P21I | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-PROTECT ENVIRONMENT | IS2P21J | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-WORKING HARD | IS2P21K | NUMERIC | - | | | Nominal |
| GOOD CITIZEN-OBEYING LAWS | IS2P21L | NUMERIC | - | | | Nominal |
| INTEREST-POLITICAL ISSUES IN COMMUNITY | IS2P22A | NUMERIC | - | | | Nominal |
| INTEREST-POLITICAL ISSUES IN COUNTRY | IS2P22B | NUMERIC | - | | | Nominal |
| INTEREST-SOCIAL ISSUES IN COUNTRY | IS2P22C | NUMERIC | - | | | Nominal |
| INTEREST-POLITICS IN OTHER COUNTRIES | IS2P22D | NUMERIC | - | | | Nominal |
| INTEREST-INTERNATIONAL POLITICS | IS2P22E | NUMERIC | - | | | Nominal |
| INTEREST-ENVIRONMENTAL ISSUES | IS2P22F | NUMERIC | - | | | Nominal |
| INTEREST-EUROPEAN POLITICS | IS2P22G | NUMERIC | - | | | Nominal |
| POLITICS-KNOW MORE ABOUT POLITICS | IS2P23A | NUMERIC | - | | | Nominal |
| POLITICS-HAVE SOMETHING TO SAY | IS2P23B | NUMERIC | - | | | Nominal |
| POLITICS-ABLE TO UNDERSTAND EASILY | IS2P23C | NUMERIC | - | | | Nominal |
| POLITICS-OPINIONS WORTH LISTENING TO | IS2P23D | NUMERIC | - | | | Nominal |
| POLITICS-ABLE TO TAKE PART AS AN ADULT | IS2P23E | NUMERIC | - | | | Nominal |
| POLITICS-GOOD UNDERSTANDING | IS2P23F | NUMERIC | - | | | Nominal |
| GENDER RIGHTS-TAKE PART IN GOVERNMENT | IS2P24A | NUMERIC | - | | | Nominal |
| GENDER RIGHTS-SAME RIGHTS IN EVERY WAY | IS2P24B | NUMERIC | - | | | Nominal |
| GENDER RIGHTS-WOMEN STAY OUT OF POLITICS | IS2P24C | NUMERIC | - | | | Nominal |
| GENDER RIGHTS-MEN MORE RIGHTS TO A JOB | IS2P24D | NUMERIC | - | | | Nominal |
| GENDER RIGHTS-EQUAL PAY WHEN SAME JOBS | IS2P24E | NUMERIC | - | | | Nominal |
| GENDER RIGHTS-QUALIFIED POLITICAL LEADER | IS2P24F | NUMERIC | - | | | Nominal |
| GENDER RIGHTS-WOMEN RAISING CHILDREN | IS2P24G | NUMERIC | - | | | Nominal |
| ETHNIC RIGHTS-CHANCE TO GOOD EDUCATION | IS2P25A | NUMERIC | - | | | Nominal |
| ETHNIC RIGHTS-CHANCE TO GOOD JOBS | IS2P25B | NUMERIC | - | | | Nominal |
| ETHNIC RIGHTS-TEACH STUDENTS TO RESPECT | IS2P25C | NUMERIC | - | | | Nominal |
| ETHNIC RIGHTS-ENCOURAGE RUN IN ELECTIONS | IS2P25D | NUMERIC | - | | | Nominal |
| ETHNIC RIGHTS-RIGHTS AND RESPONSIBILIT. | IS2P25E | NUMERIC | - | | | Nominal |
| IMMIGRANTS-SPEAKING OWN LANGUAGE | IS2P26A | NUMERIC | - | | | Nominal |
| IMMIGRANTS-SAME OPPORTUNITIES EDUCATION | IS2P26B | NUMERIC | - | | | Nominal |
| IMMIGRANTS-OPPORTUNITY VOTE IN ELECTIONS | IS2P26C | NUMERIC | - | | | Nominal |
| IMMIGRANTS-CONTINUE OWN CUSTOMS | IS2P26D | NUMERIC | - | | | Nominal |
| IMMIGRANTS-SAME RIGHTS AS EVERYONE | IS2P26E | NUMERIC | - | | | Nominal |
| IMMIGRANTS-NOT MANY JOBS RESTRICT IMMIG. | IS2P26F | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-NATIONAL GOVERNMENT | IS2P27A | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-LOCAL GOVERNMENT | IS2P27B | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-COURTS OF JUSTICE | IS2P27C | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-POLICE | IS2P27D | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-POLITICAL PARTIES | IS2P27E | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-NATIONAL PARLIAMENT | IS2P27F | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-THE MEDIA | IS2P27G | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-THE ARMED FORCES | IS2P27H | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-SCHOOLS | IS2P27I | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-THE UNITED NATIONS | IS2P27J | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-PEOPLE | IS2P27K | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-EUROPEAN COMMISSION | IS2P27L | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-EUROPEAN PARLIAMENT | IS2P27M | NUMERIC | - | | | Nominal |
| TRUST INSTITUTIONS-<STATE/PROVINCE> GOV. | IS2P27N | NUMERIC | - | | | Nominal |
| AGREE-FLAG OF COUNTRY IS IMPORTANT | IS2P28A | NUMERIC | - | | | Nominal |
| AGREE-POLITICAL SYSTEM WORKS WELL | IS2P28B | NUMERIC | - | | | Nominal |
| AGREE-GREAT RESPECT FOR COUNTRY | IS2P28C | NUMERIC | - | | | Nominal |
| AGREE-PROUD OF WHAT ACHIEVED | IS2P28D | NUMERIC | - | | | Nominal |
| AGREE-PREFER LIVE IN OTHER COUNTRY | IS2P28E | NUMERIC | - | | | Nominal |
| AGREE-PROUD TO LIVE IN COUNTRY | IS2P28F | NUMERIC | - | | | Nominal |
| AGREE-RESPECT FOR THE ENVIRONMENT | IS2P28G | NUMERIC | - | | | Nominal |
| AGREE-BETTER COUNTRY TO LIVE IN | IS2P28H | NUMERIC | - | | | Nominal |
| LIKE POLITICAL PARTY | IS2P29A | NUMERIC | - | | | Nominal |
| EXTENT-IN FAVOUR OF PARTY | IS2P29B | NUMERIC | - | | | Nominal |
| HOW WELL-DISCUSSING NEWSPAPER ARTICLE | IS2P30A | NUMERIC | - | | | Nominal |
| HOW WELL-ARGUING POINT OF VIEW | IS2P30B | NUMERIC | - | | | Nominal |
| HOW WELL-STANDING AS A CANDIDATE | IS2P30C | NUMERIC | - | | | Nominal |
| HOW WELL-ORGANISING GROUP OF STUDENTS | IS2P30D | NUMERIC | - | | | Nominal |
| HOW WELL-FOLLOWING TELEVISION DEBATE | IS2P30E | NUMERIC | - | | | Nominal |
| HOW WELL-WRITING LETTER TO NEWSPAPER | IS2P30F | NUMERIC | - | | | Nominal |
| HOW WELL-SPEAKING IN FRONT OF CLASS | IS2P30G | NUMERIC | - | | | Nominal |
| PROTEST-WRITE LETTER TO NEWSPAPER | IS2P31A | NUMERIC | - | | | Nominal |
| PROTEST-WEAR A BADGE OR T-SHIRT | IS2P31B | NUMERIC | - | | | Nominal |
| PROTEST-CONTACT <ELECTED REPRESENTATIVE> | IS2P31C | NUMERIC | - | | | Nominal |
| PROTEST-PEACEFUL MARCH OR RALLY | IS2P31D | NUMERIC | - | | | Nominal |
| PROTEST-COLLECT SIGNATURES | IS2P31E | NUMERIC | - | | | Nominal |
| PROTEST-NOT TO BUY CERTAIN PRODUCTS | IS2P31F | NUMERIC | - | | | Nominal |
| PROTEST-SPRAY-PAINT PROTEST SLOGANS | IS2P31G | NUMERIC | - | | | Nominal |
| PROTEST-BLOCK TRAFFIC | IS2P31H | NUMERIC | - | | | Nominal |
| PROTEST-OCCUPY PUBLIC BUILDING | IS2P31I | NUMERIC | - | | | Nominal |
| ADULT-VOTE IN <LOCAL ELECTIONS> | IS2P32A | NUMERIC | - | | | Nominal |
| ADULT-VOTE IN <NATIONAL ELECTIONS> | IS2P32B | NUMERIC | - | | | Nominal |
| ADULT-GET INFORMATION ABOUT CANDIDATES | IS2P32C | NUMERIC | - | | | Nominal |
| ADULT-HELP A CANDIDATE OR PARTY | IS2P32D | NUMERIC | - | | | Nominal |
| ADULT-JOIN A POLITICAL PARTY | IS2P32E | NUMERIC | - | | | Nominal |
| ADULT-JOIN A TRADE UNION | IS2P32F | NUMERIC | - | | | Nominal |
| ADULT-STAND AS A CANDIDATE <LOCAL ELEC.> | IS2P32G | NUMERIC | - | | | Nominal |
| ADULT-VOTE IN <STATE ELECTIONS> | IS2P32H | NUMERIC | - | | | Nominal |
| ADULT-VOTE IN EUROPEAN ELECTIONS | IS2P32I | NUMERIC | - | | | Nominal |
| EXPECT-VOLUNTEER TIME | IS2P33A | NUMERIC | - | | | Nominal |
| EXPECT-TALK TO OTHERS ABOUT OWN VIEWS | IS2P33B | NUMERIC | - | | | Nominal |
| EXPECT-WRITE TO A NEWSPAPER | IS2P33C | NUMERIC | - | | | Nominal |
| EXPECT-ON-LINE DISCUSSION FORUM | IS2P33D | NUMERIC | - | | | Nominal |
| EXPECT-JOIN AN ORGANISATION | IS2P33E | NUMERIC | - | | | Nominal |
| RELIGIOUS BACKGROUND | IS2P34 | NUMERIC | - | | | Nominal |
| RELIGIOUS PRACTICES | IS2P35 | NUMERIC | - | | | Nominal |
| AGREE-RELIGION MORE IMPORTANT | IS2P36A | NUMERIC | - | | | Nominal |
| AGREE-RELIGION HELPS TO DECIDE | IS2P36B | NUMERIC | - | | | Nominal |
| AGREE-RELIGIOUS LEADERS MORE POWER | IS2P36C | NUMERIC | - | | | Nominal |
| AGREE-RELIGION INFLUENCE BEHAVIOUR | IS2P36D | NUMERIC | - | | | Nominal |
| AGREE-RULES OF LIFE BASED ON RELIGION | IS2P36E | NUMERIC | - | | | Nominal |
| AGREE-RELIGION NO LONGER RELEVANT | IS2P36F | NUMERIC | - | | | Nominal |
| *STUDENT'S ETHNIC BACKGROUND* | IS2G02BN | NUMERIC | - | | | Nominal |
| *STUDENT'S COUNTRY OF BIRTH* | IS2G04AN | NUMERIC | - | | | Nominal |
| *MOTHER'S COUNTRY OF BIRTH* | IS2G04BN | NUMERIC | - | | | Nominal |
| *FATHER'S COUNTRY OF BIRTH* | IS2G04CN | NUMERIC | - | | | Nominal |
| *LANGUAGE USE AT HOME* | IS2G05N | NUMERIC | - | | | Nominal |
| *STUDENT'S RELIGION* | IS2P34N | NUMERIC | - | | | Nominal |
| *SYSTEM ID STUDENT BACKGROUND FILE* | SSYSTEM | NUMERIC | - | | | Nominal |
| *FINAL PARTICIPATION INDICATOR* | SPART | NUMERIC | - | | | Nominal |
| *POPULATION ID* | IDPOP | NUMERIC | - | | | Nominal |
| *EXPLICIT STRATUM CODE* | IDSTRATE | NUMERIC | - | | | Nominal |
| *IMPLICIT STRATUM CODE* | IDSTRATI | NUMERIC | - | | | Nominal |
| *IN ICCS 2009* | INICS09 | NUMERIC | - | | | Nominal |
| *SCHOOL BASE WEIGHT* | WGTFAC1 | NUMERIC | - | | | Nominal |
| *SCHOOL WEIGHT ADJUSTMENT-STUDENT STUDY* | WGTADJ1S | NUMERIC | - | | | Nominal |
| *CLASS WEIGHT FACTOR* | WGTFAC2S | NUMERIC | - | | | Nominal |
| *CLASS WEIGHT ADJUSTMENT* | WGTADJ2S | NUMERIC | - | | | Nominal |
| *STUDENT WEIGHT ADJUSTMENT* | WGTADJ3S | NUMERIC | - | | | Nominal |
| *FINAL STUDENT WEIGHT* | TOTWGTS | NUMERIC | - | | | Nominal |
| *JACKKNIFE ZONE - STUDENT STUDY* | JKZONES | NUMERIC | - | | | Nominal |
| *JACKKNIFE REPLICATE CODE-STUDENT STUDY* | JKREPS | NUMERIC | - | | | Nominal |
| *STUDENT SENATE WEIGHT* | SENWGTS | NUMERIC | - | | | Nominal |
| *GRADE ID* | IDGRADE | NUMERIC | - | | | Nominal |
| *STREAM* | STREAM | NUMERIC | - | | | Nominal |
| *VERSION NUMBER* | VERSION | NUMERIC | - | | | Nominal |
| *FILE CREATION DATE AT DPC HAMBURG* | DPCDATE | NUMERIC | - | | | Nominal |
| *INDICATOR FOR EXCLUDED STUDENTS* | ITEXCLUD | NUMERIC | - | | | Nominal |
| *PARTICIPATION STATUS/ACH SESSION* | ITPART1 | NUMERIC | - | | | Nominal |
| *PARTICIPATION STATUS/BG SESSION* | ITPART2 | NUMERIC | - | | | Nominal |
| *TEST ADMINISTRATORS POSITION* | ITADMINI | NUMERIC | - | | | Nominal |
| *DATE OF TESTING/MONTH* | ITDATEM | NUMERIC | - | | | Nominal |
| *DATE OF TESTING/YEAR* | ITDATEY | NUMERIC | - | | | Nominal |
| *PARTICIPATION STATUS/RM SESSION* | ITPARTR | NUMERIC | - | | | Nominal |
| *PARTICIPATION INDICATOR REGIONAL MODULE | ITRM | NUMERIC | - | | | Nominal |
| *STUDENT PART OF RELIABILITY SAMPLE* | RELBOOK | NUMERIC | - | | | Nominal |
| *SUPPORT FOR POLITICAL PARTIES* | SUPPART | NUMERIC | - | | | Nominal |
| *OCCUPATION CODE MOTHER* | MISCO88 | NUMERIC | - | | | Nominal |
| *OCCUPATION CODE FATHER* | FISCO88 | NUMERIC | - | | | Nominal |
| *BOOKLET ID* | IDBOOK | NUMERIC | - | | | Scale |
| *AGE OF STUDENT* | SAGE | NUMERIC | - | | | Nominal |
| *GENDER OF STUDENT* | SGENDER | NUMERIC | - | | | Nominal |
| *EXPECTED EDUCATION* | SISCED | NUMERIC | - | | | Nominal |
| *IMMIGRATION BACKGROUND* | IMMIG | NUMERIC | - | | | Nominal |
| *LANGUAGE USE AT HOME* | TESTLANG | NUMERIC | - | | | Nominal |
| *MOTHER'S OCCUPATIONAL STATUS* | MSEI | NUMERIC | - | | | Nominal |
| *MOTHER'S EDUCATIONAL LEVEL* | MISCED | NUMERIC | - | | | Nominal |
| *FATHER'S OCCUPATIONAL STATUS* | FSEI | NUMERIC | - | | | Nominal |
| *PARENT'S HIGHEST OCCUPATIONAL STATUS* | HISEI | NUMERIC | - | | | Nominal |
| *FATHER'S EDUCATIONAL LEVEL* | FISCED | NUMERIC | - | | | Nominal |
| *MOTHER'S INTEREST IN POL AND SOC ISS* | MINT | NUMERIC | - | | | Nominal |
| *FATHER'S INTEREST IN POL AND SOC ISS* | FINT | NUMERIC | - | | | Nominal |
| *PARENT'S INTEREST IN POL AND SOC ISS* | PARINT | NUMERIC | - | | | Nominal |
| *HOME LITERACY* | HOMELIT | NUMERIC | - | | | Nominal |
| *FAMILIY STRUCTURE* | FAMSTRUC | NUMERIC | - | | | Nominal |
| *STUDENTS' BELONGING TO A RELIGION* | RELIG | NUMERIC | - | | | Nominal |
| *STUDENTS' PARTICIPATION IN REL SERVICE* | RELPART | NUMERIC | - | | | Nominal |
| HIGHEST PARENTAL EDUCATIONAL LEVEL | HISCED | NUMERIC | - | | | Nominal |
| CIVED CONTENT KNOWLEDGE SCALE - MLE | KNOWLMLE | NUMERIC | - | | | Nominal |
| NATIONAL CIVIC KNOWLEDGE SCORE - WLE | NWLCIV | NUMERIC | - | | | Nominal |
| CIVIC KNOWLEDGE - 1ST PV | PV1CIV | NUMERIC | - | | | Nominal |
| CIVIC KNOWLEDGE - 2ND PV | PV2CIV | NUMERIC | - | | | Nominal |
| CIVIC KNOWLEDGE - 3RD PV | PV3CIV | NUMERIC | - | | | Nominal |
| CIVIC KNOWLEDGE - 4TH PV | PV4CIV | NUMERIC | - | | | Nominal |
| CIVIC KNOWLEDGE - 5TH PV | PV5CIV | NUMERIC | - | | | Nominal |
| DISCUSSION OF POL. AND SOC. ISSUES - WLE | POLDISC | NUMERIC | - | | | Nominal |
| CIVIC PARTIC. IN THE COMMUNITY - WLE | PARTCOM | NUMERIC | - | | | Nominal |
| CIVIC PARTICIPATION AT SCHOOL - WLE | PARTSCHL | NUMERIC | - | | | Nominal |
| OPENNESS IN CLASS DISCUSSION - WLE | OPDISC | NUMERIC | - | | | Nominal |
| STUDENT INFLUENCE AT SCHOOL - WLE | STUDINF | NUMERIC | - | | | Nominal |
| STUDENT-TEACHER RELATIONS - WLE | STUTREL | NUMERIC | - | | | Nominal |
| VALUE OF STUDENT PARTICIPATION - WLE | VALPARTS | NUMERIC | - | | | Nominal |
| SUPPORT FOR DEMOCRATIC VALUES - WLE | DEMVAL | NUMERIC | - | | | Nominal |
| CONVENTIONAL CITIZENSHIP - WLE | CITCON | NUMERIC | - | | | Nominal |
| SOCIAL MOVEMENT REL. CITIZENSHIP - WLE | CITSOC | NUMERIC | - | | | Nominal |
| INTEREST IN POL.AND SOC. ISSUES - WLE | INTPOLS | NUMERIC | - | | | Nominal |
| SELF-CONCEPT IN POLITICS - WLE | INPOLEF | NUMERIC | - | | | Nominal |
| ATTITUDES TOWARDS GENDER EQUALITY - WLE | GENEQL | NUMERIC | - | | | Nominal |
| EQUAL RIGHTS FOR ALL ETHNIC GROUPS - WLE | ETHRGHT | NUMERIC | - | | | Nominal |
| EQUAL RIGHTS FOR IMMIGRANTS - WLE | IMMRGHT | NUMERIC | - | | | Nominal |
| TRUST IN CIVIC INSTITUTIONS - WLE | INTRUST | NUMERIC | - | | | Nominal |
| ATTITUDES TOWARDS OWN COUNTRY - WLE | ATTCNT | NUMERIC | - | | | Nominal |
| CITIZENSHIP SELF-EFFICACY - WLE | CITEFF | NUMERIC | - | | | Nominal |
| PARTIC. IN FUTURE LEGAL PROTEST - WLE | LEGPROT | NUMERIC | - | | | Nominal |
| PARTIC. IN FUTURE ILLEGAL PROT. - WLE | ILLPROT | NUMERIC | - | | | Nominal |
| ADULT ELECTORAL PARTICIPATION - WLE | ELECPART | NUMERIC | - | | | Nominal |
| ADULT PARTIC. IN POL. ACTIVITIES - WLE | POLPART | NUMERIC | - | | | Nominal |
| FUTURE INFORMAL POL. PARTICIPATION - WLE | INFPART | NUMERIC | - | | | Nominal |
| INFLUENCE OF RELIGION ON SOCIETY - WLE | RELINF | NUMERIC | - | | | Nominal |
| EXPECTED YEARS OF FURTHER EDUCATION | EXPEDYRS | NUMERIC | - | | | Nominal |
| HIGHEST PARENTAL EDUCATION YRS SCHOOLING | PAREDYRS | NUMERIC | - | | | Nominal |
| NATIONAL INDEX OF SOCIOECON. BACKGROUND | NISB | NUMERIC | - | | | Nominal |