Descriptions of known UCDs

Metadata

Identifier

ivo://org.gavo.dc/ucds/ui/known

Cite this

News

2017-05-31 (MD): Now using the relational registry as the data basis rather than VizieR columns exclusively. In consequence, scoring is no longer based on the old naive Bayesian scheme but on Postgres' full text search. Also enabled the api renderer.

Description

The UCD resolver uses the metadata in the current Registry to suggest UCDs pertinent to natural language column descriptions. In that, it fulfills a similar function as the CDS UCD builder but uses an entirely different approach.

Keywords

Virtual observatories

List of official UCDs

Creator

GAVO Data Centre

Created

2008-05-21T16:37:00Z

Metadata updated

2024-10-02T09:46:41Z

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Descriptions of known UCDs

	arraysize -- The shape of the array that constitutes the value, e.g., 4, , 4, 5x4, or 5x*, as specified by VOTable.
	datatype -- The type of the data contained in the column.
	delim -- The string that is used to delimit elements of an array value when arraysize is not '1'.
	extended_schema -- An identifier for the schema that the value given by the extended attribute is drawn from.
	extended_type -- A custom type for the values this column contains.
	flag -- Hash-separated keywords representing traits of the column. Recognized values include "indexed", "primary", and "nullable".
	ivoid -- The parent resource.
	name -- The name of the column.
	std -- If 1, the meaning and use of this column is reserved and defined by a standard model. If 0, it represents a database-specific column that effectively extends beyond the standard.
	table_index -- Index of the table this column belongs to.
	type_system -- The type system used, as a QName with a canonical prefix; this will ususally be one of vs:simpledatatype, vs:votabletype, and vs:taptype.
	ucd -- A unified content descriptor that describes the scientific content of the column.
	unit -- The unit associated with all values in the column.
	utype -- An identifier for a role in a data model that the data in this column represents.

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Descriptions of known UCDs