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Saved by 44 people (-8 private), first by anonymouse user on 2006-07-29


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on 2006-08-08 by avivagabriel

Clarity regarding controlled vocabularies, taxonomies, thesauri, ontologies, and metamodels. With all the scuttlebut going around about folksonomies and tagging, these are important terms to understand. In the process of tagging, it's pretty noticeable that the process is like firing up a "synonym brainstorm." So...what's the difference, if any, between drumming up synonyms, and creating tags (or metatags)? The discussion gets deeper when roving into the realms of doing a "controlled vocabulary" search on PubMed using MeSH terms, or (god help us) fashioning an ontology...

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What are the differences between a vocabulary, a taxonomy, a thesaurus, an ontology, and a meta-model

Highlighted by avivagabriel

What are the differences between a vocabulary, a taxonomy, a thesaurus, an ontology, and a meta-model?

Highlighted by asgood

What are the differences between a vocabulary, a taxonomy, a thesaurus, an ontology, and a meta-model?

Highlighted by xxcchen

Highlighted by triple_entendre

A t a >xonomy is a collection of controlled vocabulary terms organized into a hierarchical structure. Each term in a taxonomy is in one or more parent-child relationships to other terms in the taxonomy. There may be different types of parent-child relationships in a taxonomy (e.g., whole-part, genus-species, type-instance)

Highlighted by rahulg

A controlled vocabulary is a list of terms that have been enumerated explicitly.

Highlighted by rahulg

list of terms that have been enumerated explicitly

Highlighted by alice2984

A thesaurus is a networked collection of controlled vocabulary terms. This means that a thesaurus uses associative relationships in addition to parent-child relationships.

Highlighted by rahulg

collection of controlled vocabulary terms organized into a hierarchical structure

Highlighted by alice2984

Some taxonomies allow poly-hierarchy, which means that a term can have multiple parents

Highlighted by sarahmryan

A thesaurus is a networked collection of controlled vocabulary terms.

Highlighted by trumble

networked collection of controlled vocabulary terms

Highlighted by alice2984

thesaurus uses associative relationships

Highlighted by sarahmryan

A meta-model is an explicit model of the constructs and rules needed to build specific models within a domain of interest.

Highlighted by rahulg

A formal ontology is a controlled vocabulary expressed in an ontology representation language. This language has a grammar for using vocabulary terms to express something meaningful within a specified domain of interest

Highlighted by rahulg

People make commitments to use a specific controlled vocabulary or ontology for a domain of interest.

Highlighted by sarahmryan

A valid meta-model is an ontology, but not all ontologies are modeled explicitly as meta-models.

Highlighted by rahulg

Taxonomies and Thesauri may relate terms in a controlled vocabulary via parent-child and associative relationships

Highlighted by sarahmryan

all have in common

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all have in common

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all have in common

Highlighted by sarahmryan

What controlled vocabularies, taxonomies, thesauri, ontologies

Highlighted by sarahmryan

  • They are approaches to help structure, classify, model, and or represent the concepts and relationships pertaining to some subject matter of interest to some community.

    • Highlighted by sarahmryan

    enable a community to come to agreement and to commit to use the same terms in the same way

    Highlighted by sarahmryan

    They are fuzzy, ill-defined notions used in many different ways by different individuals and communities.

    Highlighted by sarahmryan

    If a taxonomy has a variety of very carefully defined meanings for the hierarchical link, then it bears a stronger resemblance to an ontology.

    Highlighted by rahulg

    Both a thesaurus and a taxonomy can be seen as having a simple language that could be given a grammar, although this is not normally done.

    Highlighted by rahulg

    It is thus not useful to say one is an ontology and the other is not because one lacks a formal semantics. The truth is there is a fuzzy line connecting these things.

    Highlighted by rahulg

    ontology'

    Highlighted by sarahmryan

    a rich and formal logic-based language for specifying meaning of the terms

    Highlighted by sarahmryan

    you use that vocabulary to create a set of data

    Highlighted by sarahmryan