Country code 3-character (autorekodiert (FDZ))
1 = Germany

PISA Assessment Cycle (2 digits + 2 character Assessment type - MS/FT) (autorekodiert (FDZ))
1 = 07MS

64387 = Russian Federation: Republic of Tatarstan

Stratum ID 7-character (cnt + region ID + original stratum ID) (autorekodiert (FDZ))
1 = DEU - stratum 01: NOR / Baden-Wuerttemberg (BW)
2 = DEU - stratum 02: NOR / Bayern (BY)
3 = DEU - stratum 03: NOR / Berlin (BE)
4 = DEU - stratum 04: NOR / Brandenburg (BB)
5 = DEU - stratum 05: NOR / Bremen (HB)
6 = DEU - stratum 06: NOR / Hamburg (HH)
7 = DEU - stratum 07: NOR / Hessen (HE)
8 = DEU - stratum 08: NOR / Mecklenburg-Vorpommern (MV)
9 = DEU - stratum 09: NOR / Niedersachsen (NI)
10 = DEU - stratum 10: NOR / Nordrhein-Westfalen (NW)
11 = DEU - stratum 11: NOR / Rheinland-Pfalz (RP)
12 = DEU - stratum 12: NOR / Saarland (SL)
13 = DEU - stratum 13: NOR / Sachsen (SN)
14 = DEU - stratum 14: NOR / Sachsen-Anhalt (ST)
15 = DEU - stratum 15: NOR / Schleswig-Holstein (SH)
16 = DEU - stratum 16: NOR / Thueringen (TH)
17 = DEU - stratum 17: SEN schools
18 = DEU - stratum 18: Vocational Schools

OECD country
0 = No
1 = Yes

Mode of Respondent
1 = Paper
2 = Computer

Total Time: STIntro1
99999995 = Valid Skip
99999997 = Not Applicable
99999998 = Invalid
99999999 = No Response

1 = 29APR19:09:28:37
2 = 29APR19:09:28:38
3 = 29APR19:09:28:39