meta
Usage:
meta [<item> ...]
Provides information about the metadata for each column. This filter turns the table sideways, so that each row of the output corresponds to a column of the input. The columns of the output table contain metadata items such as column name, units, UCD etc corresponding to each column of the input table.
By default the output table contains columns for all metadata items for which any of the columns have non-blank values.
However, the output may be customised by supplying
one or more <item> headings,
in which case exactly those columns will appear,
regardless of whether they have entries.
It is not an error
to specify an item for which no metadata exists in any of
the columns (such entries will result in empty columns).
Some of the metadata items commonly found are:
Index: Position of column in table
Name: Column name
Class: Data type of objects in column
Shape: Shape of array values
ElSize: Size of each element in column (mostly useful for strings)
Units: Unit string
Description: Description of data in the column
UCD: Unified Content Descriptor
Utype: Type in data model
Xtype: Extended data type
CoosysSystem: Sky coordinate system name from COOSYS
CoosysEpoch: Sky epoch from COOSYS
CoosysRefposition: Reference position from COOSYS
CoosysEquinox: Sky equinox from COOSYS
TimesysTimeorigin: Time origin from TIMESYS
TimesysTimescale: Timescale from TIMESYS
TimesysRefposition: Ref position from TIMESYS
STIL_HPX_LEVEL: Level of HEALPix pixels contained in the table (nside=2^level)
STIL_HPX_ISNEST: True for NEST indexation scheme, False for RING
STIL_HPX_COLNAME: Name of the table column containing HEALPix index; null value or empty string indicates implicit
STIL_HPX_CSYS: 'C'=celestial/equatorial, 'G'=galactic, 'E'=ecliptic
Any table parameters of the input table are propagated to the output one.