Extending SiDIF: Difference between revisions

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= SiDIF Extension Proposal =
= SiDIF Extension Proposal =


== 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:
=== 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:
** Entity - Object
** Link - relation between two objects
 
* Paradigm mappings:
** OO: Objects and their relationships
** 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>


=== Description Logic Basis ===
== Semantic Web Integration ==
* Components:
** Concepts (Classes)
** Roles (Properties)
** Individuals (Instances)


=== RDF/OWL Mappings ===
=== 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:
=== Reference Keywords Options ===
** Advantages: Flexibility for different implementations
* Full form approach:
** Challenges: Increased complexity management
** subject for the entity being described
** predicate for the relationship
** object for the target entity
* Short form approach:
** s for subject
** p for predicate
** o for object
* Alternative approach:
** subject for entity
** link for relationship
** object for target
 
=== Key Bridging Concepts ===
* 'it' semantics bridges:
** OO: self/this/me concepts
** Semantic Web: subject references
* Statement part references support:
** Metadata about relationships
** Integration with semantic web identifiers
** Technology-specific bindings
 
=== Relationship Considerations ===
* 1:n relations characteristics:
** Enables flexible technology bindings
** Increases system complexity
** Requires careful management
 
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 09:59, 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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