Difference between revisions of "Extending SiDIF"

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= SiDIF Extension Proposal =
 
= SiDIF Extension Proposal =
  
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== Statement Representations and Evolution ==
+
== Core Problem: Statements About Statements ==
  
−
=== Natural Language Statement ===
+
=== Evolution of Statement Representation ===
−
The simplest form of a statement contains:
+
* Natural language triple:
−
* subject
 
−
* predicate
 
−
* object
 
−
 
 
−
Example:
 
 
<syntaxhighlight lang="text">
 
<syntaxhighlight lang="text">
 
dad loves mom
 
dad loves mom
 
</syntaxhighlight>
 
</syntaxhighlight>
  
−
=== Semantic Web Identifiers ===
+
* Raw Wikidata URLs:
−
The same triple structure with Wikidata URLs:
 
 
<syntaxhighlight lang="text">
 
<syntaxhighlight lang="text">
 
https://www.wikidata.org/wiki/Q76 https://www.wikidata.org/wiki/Property:P26 https://www.wikidata.org/wiki/Q13133
 
https://www.wikidata.org/wiki/Q76 https://www.wikidata.org/wiki/Property:P26 https://www.wikidata.org/wiki/Q13133
 
</syntaxhighlight>
 
</syntaxhighlight>
  
 +
* Same URLs as active links:
 
https://www.wikidata.org/wiki/Q76 https://www.wikidata.org/wiki/Property:P26 https://www.wikidata.org/wiki/Q13133
 
https://www.wikidata.org/wiki/Q76 https://www.wikidata.org/wiki/Property:P26 https://www.wikidata.org/wiki/Q13133
  
−
=== Human-Readable with Links ===
+
* Human-readable with links:
−
<syntaxhighlight lang="text">
 
−
[https://www.wikidata.org/wiki/Q76 Barack Obama] [https://www.wikidata.org/wiki/Property:P26 spouse] [https://www.wikidata.org/wiki/Q13133 Michelle Obama]
 
−
</syntaxhighlight>
 
−
 
 
 
[https://www.wikidata.org/wiki/Q76 Barack Obama] [https://www.wikidata.org/wiki/Property:P26 spouse] [https://www.wikidata.org/wiki/Q13133 Michelle Obama]
 
[https://www.wikidata.org/wiki/Q76 Barack Obama] [https://www.wikidata.org/wiki/Property:P26 spouse] [https://www.wikidata.org/wiki/Q13133 Michelle Obama]
  
−
== Current SiDIF Reference Mechanism ==
+
=== Current Reference Using 'it' ===
−
 
+
* Basic reference to subject:
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=== Using 'it' Keyword ===
 
−
The 'it' keyword refers to the subject of the previous statement:
 
−
 
 
 
<syntaxhighlight lang="text">
 
<syntaxhighlight lang="text">
 
dad loves mom
 
dad loves mom
Line 40: Line 28:
 
</syntaxhighlight>
 
</syntaxhighlight>
  
−
=== Proposed Extension for Statement Parts ===
+
=== Need for Statement Part References ===
−
References to different parts of statements:
+
* Challenge: How to reference different parts of a statement?
 +
* Options:
 +
** Using subject/predicate/object (full)
 +
** Using s/p/o (short)
 +
** Using subject/link/object (alternative)
  
 +
=== Proposed Solution ===
 +
* Example using full form:
 
<syntaxhighlight lang="text">
 
<syntaxhighlight lang="text">
 +
Barack spouse Michelle
 
https://www.wikidata.org/wiki/Q76 is wikidata_url of subject
 
https://www.wikidata.org/wiki/Q76 is wikidata_url of subject
 
1992-10-03 is date of predicate
 
1992-10-03 is date of predicate
Line 49: Line 44:
 
</syntaxhighlight>
 
</syntaxhighlight>
  
−
== Core Concepts and Bridging ==
+
== Bridging Paradigms ==
−
 
 
−
=== Fundamental Elements ===
 
−
* Core elements:
 
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** Entity - Object
 
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** Link - relation between two objects
 
−
 
 
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* Paradigm mappings:
 
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** OO: Objects and their relationships
 
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** Semantic Web: Resources and properties
 
−
 
 
−
=== Technology Integration ===
 
−
Example of technology bindings:
 
  
 +
=== Object-Oriented to Semantic Web Bridge ===
 +
* 'it' keyword bridges:
 +
** OO concepts (self/this/me)
 +
** Semantic Web references
 +
* Indirection levels:
 
<syntaxhighlight lang="text">
 
<syntaxhighlight lang="text">
 
Person isA Concept
 
Person isA Concept
Line 68: Line 56:
 
http://foaf/... is prefix_url of subject
 
http://foaf/... is prefix_url of subject
 
foaf is prefix of subject
 
foaf is prefix of subject
−
 
 
Barack1950 isA Person
 
Barack1950 isA Person
 
"Barack" is firstname of subject
 
"Barack" is firstname of subject
 
</syntaxhighlight>
 
</syntaxhighlight>
  
−
== Semantic Web Foundation ==
+
=== Real World Example: Obama Family ===
 +
* Marriage statement with metadata:
 +
<syntaxhighlight lang="text">
 +
Barack spouse Michelle
 +
"1992-10-03" is startTime of predicate
 +
"Trinity United Church of Christ" is place of predicate
 +
</syntaxhighlight>
 +
 
 +
* Name history with temporal metadata:
 +
<syntaxhighlight lang="text">
 +
Michelle familyName "Obama"
 +
"married name" is role of predicate
 +
"1992-10-03" is startTime of predicate
 +
 
 +
Michelle familyName "Robinson"
 +
"maiden name" is role of predicate
 +
"1964-01-17" is startTime of predicate
 +
"1992" is endTime of predicate
 +
</syntaxhighlight>
  
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=== Description Logic Basis ===
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== Semantic Web Integration ==
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* Components:
 
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** Concepts (Classes)
 
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** Roles (Properties)
 
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** Individuals (Instances)
 
  
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=== RDF/OWL Mappings ===
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=== Description Logic Foundations ===
−
Class hierarchy and instance relationships:
+
* Basic concepts:
 +
** T mit Balken (top concept)
 +
** Bottom concept (umgedrehtes T)
 +
* Mappings:
 +
** OWL/Description Logic: Concepts, Roles, Individuals
 +
** RDF: Classes, Properties, Individuals
  
 +
=== Implementation Examples ===
 +
* Class hierarchy:
 
<syntaxhighlight lang="text">
 
<syntaxhighlight lang="text">
 
Concept subClassOf owl:Thing
 
Concept subClassOf owl:Thing
 
owl:Nothing
 
owl:Nothing
 +
</syntaxhighlight>
 +
 +
* Instance relationships:
 +
<syntaxhighlight lang="text">
 
Barack rdfType Person
 
Barack rdfType Person
 
</syntaxhighlight>
 
</syntaxhighlight>
  
−
== Design Decisions ==
+
=== Technology Bindings ===
−
 
+
* Allows 1:n relationships:
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=== Reference Keywords Options ===
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** Advantages: Flexibility for different implementations
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* Full form approach:
+
** Challenges: Increased complexity management
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** subject for the entity being described
 
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** predicate for the relationship
 
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** object for the target entity
 
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* Short form approach:
 
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** s for subject
 
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** p for predicate
 
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** o for object
 
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* Alternative approach:
 
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** subject for entity
 
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** link for relationship
 
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** object for target
 
−
 
 
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=== Key Bridging Concepts ===
 
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* 'it' semantics bridges:
 
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** OO: self/this/me concepts
 
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** Semantic Web: subject references
 
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* Statement part references support:
 
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** Metadata about relationships
 
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** Integration with semantic web identifiers
 
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** Technology-specific bindings
 
−
 
 
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=== Relationship Considerations ===
 
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* 1:n relations characteristics:
 
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** Enables flexible technology bindings
 
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** Increases system complexity
 
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** Requires careful management
 
−
 
 
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Example of 1:n relation expression:
 
  
 +
* Example bindings:
 
<syntaxhighlight lang="text">
 
<syntaxhighlight lang="text">
 
Person_Sparql is sparql_impl of subject
 
Person_Sparql is sparql_impl of subject

Revision as of 10:59, 28 January 2025

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SiDIF Extension Proposal

Core Problem: Statements About Statements

Evolution of Statement Representation

  • Natural language triple:
dad loves mom
  • Raw Wikidata URLs:
https://www.wikidata.org/wiki/Q76 https://www.wikidata.org/wiki/Property:P26 https://www.wikidata.org/wiki/Q13133
  • Same URLs as active links:

https://www.wikidata.org/wiki/Q76 https://www.wikidata.org/wiki/Property:P26 https://www.wikidata.org/wiki/Q13133

  • Human-readable with links:

Barack Obama spouse Michelle Obama

Current Reference Using 'it'

  • Basic reference to subject:
dad loves mom
https://www.wikidata.org/wiki/Q76 is wikidata_url of it

Need for Statement Part References

  • Challenge: How to reference different parts of a statement?
  • Options:
    • Using subject/predicate/object (full)
    • Using s/p/o (short)
    • Using subject/link/object (alternative)

Proposed Solution

  • Example using full form:
Barack spouse Michelle
https://www.wikidata.org/wiki/Q76 is wikidata_url of subject
1992-10-03 is date of predicate
https://www.wikidata.org/wiki/Q13133 is wikidata_url of object

Bridging Paradigms

Object-Oriented to Semantic Web Bridge

  • 'it' keyword bridges:
    • OO concepts (self/this/me)
    • Semantic Web references
  • Indirection levels:
Person isA Concept
Person_Sparql is sparql_impl of subject
http://foaf/... is prefix_url of subject
foaf is prefix of subject
Barack1950 isA Person
"Barack" is firstname of subject

Real World Example: Obama Family

  • Marriage statement with metadata:
Barack spouse Michelle
"1992-10-03" is startTime of predicate
"Trinity United Church of Christ" is place of predicate
  • Name history with temporal metadata:
Michelle familyName "Obama"
"married name" is role of predicate
"1992-10-03" is startTime of predicate

Michelle familyName "Robinson"
"maiden name" is role of predicate
"1964-01-17" is startTime of predicate
"1992" is endTime of predicate

Semantic Web Integration

Description Logic Foundations

  • Basic concepts:
    • T mit Balken (top concept)
    • Bottom concept (umgedrehtes T)
  • Mappings:
    • OWL/Description Logic: Concepts, Roles, Individuals
    • RDF: Classes, Properties, Individuals

Implementation Examples

  • Class hierarchy:
Concept subClassOf owl:Thing
owl:Nothing
  • Instance relationships:
Barack rdfType Person

Technology Bindings

  • Allows 1:n relationships:
    • Advantages: Flexibility for different implementations
    • Challenges: Increased complexity management
  • Example bindings:
Person_Sparql is sparql_impl of subject
foaf is prefix of subject
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