notebook/notes/encoding/rdf.md

title	TARGET DECK	FILE TAGS	tags
RDF	Obsidian::STEM	rdf	rdf

Overview

The Resource Description Framework (RDF) is the foundational representation language of the Semantic Web. The basic building block of RDF is the triple containing a subject, predicate, and object. Global identifiers of resources are represented as uri (or, more generally, IRIs). These URIs can be expressed more compactly as uri#CURIEs.

%%ANKI Basic Which organization standardized RDF? Back: W3C Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What is W3C an acronym for? Back: World Wide Web Consortium. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What is RDF an acronym for? Back: Resource Description Framework. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What is considered the basic representation language of the Semantic Web? Back: RDF. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Cloze With respect to RDF, a {resource} is {anything representable on the web}. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What aggregate concept is considered the basic building block of RDF? Back: The triple. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What three components make up an RDF triple? Back: The subject, predicate, and object. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Cloze In RDF, a triple is a ({subject}, {predicate}, {object}) tuple. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Cloze A {subject} is to a semantic triple as a row number is to a relation record. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Cloze A {predicate} is to a semantic triple as an attribute is to a relation record. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Cloze An {object} is to a semantic triple as a value is to a relation record. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic Consider converting the following table to a triple. What is the subject? ! Back: Row 2 Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic Consider converting the following table to a triple. What is the object? ! Back: Hamlet Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic Consider converting the following table to a triple. What is the predicate? ! Back: Title Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic RDF identifiers use what encoding? Back: URIs. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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Reification

Reification refers to the process by which an abstract idea is made concrete. In the context of RDF, it refers to writing RDF statements about RDF statements.

%%ANKI Basic What is reification? Back: The process by which an abstract idea is made concrete. Reference: “Reification (Knowledge Representation),” in Wikipedia, October 3, 2023, https://en.wikipedia.org/w/index.php?title=Reification_(knowledge_representation).

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%%ANKI Basic In the context of RDF, what does reification typically refer to? Back: Creating RDF statements about RDF statements. Reference: “Reification (Knowledge Representation),” in Wikipedia, October 3, 2023, https://en.wikipedia.org/w/index.php?title=Reification_(knowledge_representation).

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%%ANKI Basic In the context of RDF, what abstract notion is typically reified? Back: RDF statements. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What term describes making an abstract concept concrete? Back: Reification. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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This kind of metadata about statements often take the forms of:

• Provenance. Information about the source of a statement.
• Likelihood. Information quantifying some probability regarding the statement.
• Context. Information about a setting in which a statement holds.
• Time frame. Information that holds within a particular period of time.

%%ANKI Basic What might reifying a statement with respect to its provenance refer to? Back: Information about the source of the statement. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What "form" of reification does the following sentence take on? \text{Wikipedia says Shakespeare wrote Hamlet.} Back: Provenance. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What might reifying a statement with respect to its likelihood refer to? Back: Information quantifying some probability of the statement holding. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What "form" of reification does the following sentence take on? \text{It is 90% probable that Shakespeare wrote Hamlet.} Back: Likelihood. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What might reifying a statement with respect to its context refer to? Back: Information about a setting in which the statement holds. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What "form" of reification does the following sentence take on? \text{Kenneth Branagh played Hamlet in the movie.} Back: Context. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What might reifying a statement with respect to its time frame refer to? Back: Information about a period of time in which the statement holds. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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%%ANKI Basic What "form" of reification does the following sentence take on? \text{Hamlet plays on Broadway Jan. 11th through Mar. 12th.} Back: Time frame. Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.

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Bibliography

• Allemang, Dean, James A. Hendler, and Fabien L. Gandon. Semantic Web for the Working Ontologist. 3e ed. ACM Books 33. New York: Association for computing machinery, 2020.
• “Reification (Knowledge Representation),” in Wikipedia, October 3, 2023, https://en.wikipedia.org/w/index.php?title=Reification_(knowledge_representation).