# Values¶

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

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 by this VALUES element.

Methods Summary

 from_table_column(column) Are the settings on this VALUE element all the same as the XML defaults? 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)[source]
is_defaults()[source]

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

parse(iterator, config)[source]

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

Parameters
iteratorxml iterator

An iterator over XML elements as returned by get_xml_iterator.

configdict

The configuration dictionary that affects how certain elements are read.

Returns
selfElement

Returns self as a convenience.

to_table_column(column)[source]
to_xml(w, **kwargs)[source]

For internal use. Output the element to XML.

Parameters
wastropy.utils.xml.writer.XMLWriter object

An XML writer to write to.

kwargsdict

Any configuration parameters to control the output.