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  VizieR META catalogue
Describes the Catalogues and Tables accessible via VizieR (also called ReferenceDirectory)
Post annotation
1.METAucdUCD1+ Unified Content Descriptor (515 rows)

Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  ucdid  (i) UCD 'word' identifier: 1-511=word, 512-895=em.line, 900-1023=em, special>1023 (meta.code;meta.ucd)
  class  o10=Primary-only, o20=Secondary-only, 1=requires_1em, 2=requires_2em, 0100=Vector (meta.code.class)
  famid  What is the 'best' corresponding UCD1 (
  name (char) The UCD1+ 'word' (;meta.main)
  explain (char) An explanation of the meaning of the UCD (meta.note)

ALL cols
 (i)indexed column
Adapt form
Display your selection only Reset to default columns
usage  Display UCD1+    UCD1  
elapse time 1

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