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In metadata, a synonym ring or synset, is a group of data elements that are considered semantically equivalent for the purposes of information retrieval.^{[citation needed]} These data elements are frequently found in different metadata registries. Although a group of terms can be considered equivalent, metadata registries store the synonyms at a central location called the preferred data element.

According to WordNet, a synset or synonym set is defined as a set of one or more synonyms that are interchangeable in some context without changing the truth value of the proposition in which they are embedded.

Example

The following are considered semantically equivalent and form a synonym ring:

foaf:person
gjxdm:Person
niem:Person
sumo:Human
cyc:Person
umbel:Person

Note that each data element has two components:

Namespace prefix, which is a shorthand for the name of the metadata registry
Data element name, which is the name of the object in each of the distinct metadata registry

Expressing a synonym ring

A synonym ring can be expressed by a series of statements in the Web Ontology Language (OWL) using the classEquivalence or the propertyEquivalence or instance equivalence statement – the sameAs property.

External links

WordNet at Princeton

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 {{Unreferenced|date=July 2010}}
-In [[metadata]] a '''synonym ring''' or '''synset''', is a group of [[data element]]s that are considered [[semantically]] equivalent for the purposes of information retrieval.  These data elements are frequently found in different [[metadata registry|metadata registries]]. Although a group of terms can be considered equivalent, metadata registries store the synonyms at a central location called the preferred data element.
+In [[metadata]], a '''synonym ring''' or '''synset''', is a group of [[data element]]s that are considered [[semantically]] equivalent for the purposes of information retrieval.{{Citation needed|reason=It is easy to find definitions of "synonym ring" as a set of terms that are synonymous, but finding a definition in terms of "data element" seems hard. Thus, citation needed.|date=December 2022}}  These data elements are frequently found in different [[metadata registry|metadata registries]]. Although a group of terms can be considered equivalent, [[metadata]] registries store the synonyms at a central location called the preferred data element.
 According to [[WordNet]], a ''synset'' or synonym set is defined as a set of one or more [[synonyms]] that are interchangeable in some context without changing the [[truth value]] of the proposition in which they are embedded.
 == Example ==
+{{Technical|section|date=May 2021}}
 The following are considered semantically equivalent and form a synonym ring:
@@ Line 16: / Line 19: @@
 Note that each data element has two components:
-# '''Namespace prefix''' which is a shorthand for the name of the metadata registry
+# '''Namespace prefix,''' which is a shorthand for the name of the metadata registry
-# '''Data element name''' The name of the object in each of the distinct metadata registry
+# '''Data element name,''' which is the name of the object in each of the distinct metadata registry
 == Expressing a synonym ring ==
-A synonym ring can be expressed by a series of statements in the [[Web Ontology Language]] (OWL) using  the <code>classEquivalence</code> or the <code>propertyEquivalence</code> or instance equivalence statement - the <code>sameAs</code> property.
+A synonym ring can be expressed by a series of statements in the [[Web Ontology Language]] (OWL) using  the <code>classEquivalence</code> or the <code>propertyEquivalence</code> or instance equivalence statement – the <code>[[sameAs]]</code> property.
 <!--http://www.w3.org/TR/2004/REC-owl-guide-20040210/#OntologyMapping-->
 ==See also==
+*[[Data Reference Model]]
 *[[Metadata]]
 *[[Vocabulary-based transformation]]
-*[[Data Reference Model]]
-*[[ANSI/NISO Z39.19-200x]]
 *[[WordNet]]
 ==External links==
-* [http://wordnet.princeton.edu Princeton WordNet Home Page]
+* [http://wordnet.princeton.edu WordNet] at [[Princeton University|Princeton]]
 [[Category:Metadata]]
 {{Comp-sci-stub}}
-[[de:Synset]]
-[[it:Synset]]