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 VizieR META catalogue
Describes the Catalogues and Tables accessible via VizieR (also called ReferenceDirectory)
Post annotation
1.METAqinDescription of otuput of Query Program PK=(catid,tabid,colid)

Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  catid  catalogue identification FK(METAcat) (meta.code;meta.dataset)
  tabid  table identification as in METAtab (meta.code;meta.dataset)
  colid  column identification as in METAcol (
  offset  column position (from 0) in strem (meta.code;
  length  column position (from 0) in strem (meta.code;
  sep  ASCII representation of column separator (meta.code;
  fnull  The NULL used for this column (meta.code)

ALL cols
Adapt form
Display your selection only Reset to default columns
usage  Display UCD1+    UCD1  
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