flags

Flags indicate the kind of operation on the data and it's author

First three letters

  • LOG - control over logic consistency,
  • FIL - control over correctness with respect to the instructions at filter questions,
  • REC - creating derived variables on the basis of the already existent,
  • UDC - control over non-documented "wild codes",
  • STD - standardization of the special codes,
  • STR - data-set contains string values,
  • CDB - codebook included,
  • FRE - frequencies available,
  • DSC - descriptive statistics included,
  • ASC - data set in ASCII format included,
  • DDS - data definition statements included,
  • MIS - "missing values" procedure included.

P or A indicate author of the operation

  • P - operation done by producer,
  • A - operation done by ADS staff.