Values

class astropy.io.votable.tree.Values(votable, field, ID=None, null=None, ref=None, type='legal', id=None, config=None, pos=None, **extras)

Bases: astropy.io.votable.tree.Element, astropy.io.votable.tree._IDProperty

VALUES element: used within FIELD and PARAM elements to define the domain of values.

The keyword arguments correspond to setting members of the same name, documented below.

Attributes Summary

max	The maximum value of the domain.
max_inclusive	When True, the domain includes the maximum value.
min	The minimum value of the domain.
min_inclusive	When True, the domain includes the minimum value.
null	For integral datatypes, null is used to define the value used for missing values.
options	A list of string key-value tuples defining other OPTION elements for the domain.
ref	Refer to another VALUES element by ID, defined previously in the document, for MIN/MAX/OPTION information.
type	[required] Defines the applicability of the domain defined

Methods Summary

from_table_column(column)
is_defaults()	Are the settings on this VALUE element all the same as the
parse(iterator, config)	For internal use.
to_table_column(column)
to_xml(w, **kwargs)	For internal use.

Attributes Documentation

max

The maximum value of the domain. See max_inclusive.

max_inclusive

When True, the domain includes the maximum value.

min

The minimum value of the domain. See min_inclusive.

min_inclusive

When True, the domain includes the minimum value.

null

For integral datatypes, null is used to define the value used for missing values.

options

A list of string key-value tuples defining other OPTION elements for the domain. All options are ignored – they are stored for round-tripping purposes only.

ref

Refer to another VALUES element by ID, defined previously in the document, for MIN/MAX/OPTION information.

type

[required] Defines the applicability of the domain defined by this VALUES element. Must be one of the following strings:

• ‘legal’: The domain of this column applies in general to this datatype. (default)
• ‘actual’: The domain of this column applies only to the data enclosed in the parent table.

Methods Documentation

from_table_column(column)

is_defaults()

Are the settings on this VALUE element all the same as the XML defaults?

parse(iterator, config)

For internal use. Parse the XML content of the children of the element.

Parameters:

iterator : xml iterator

An iterator over XML elements as returned by get_xml_iterator.

config : dict

The configuration dictionary that affects how certain elements are read.

Returns:

self : Element

Returns self as a convenience.

to_table_column(column)

to_xml(w, **kwargs)

For internal use. Output the element to XML.

Parameters:

w : astropy.utils.xml.writer.XMLWriter object

An XML writer to write to.

kwargs : dict

Any configuration parameters to control the output.