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# SiDIF Extension Proposal
= SiDIF Extension Proposal =


## 1. Statement Representations and Evolution
== 1. Statement Representations and Evolution ==


### 1.1 Natural Language Statement
=== 1.1 Natural Language Statement ===
<syntaxhighlight lang="text">
<syntaxhighlight lang="text">
dad loves mom
dad loves mom
</syntaxhighlight>
</syntaxhighlight>
This represents the most basic, human-readable form of a statement. It contains:
This represents the most basic, human-readable form of a statement. It contains:
- subject (dad)
* subject (dad)
- predicate (loves)
* predicate (loves)
- object (mom)
* object (mom)


### 1.2 Semantic Web Identifiers
=== 1.2 Semantic Web Identifiers ===
The same triple structure with Wikidata URLs:
The same triple structure with Wikidata URLs:
<syntaxhighlight lang="text">
<syntaxhighlight lang="text">
Line 22: Line 22:
Now each part has a unique identifier in the semantic web space. The first version shows the raw syntax, while the second version shows the actual linked URIs.
Now each part has a unique identifier in the semantic web space. The first version shows the raw syntax, while the second version shows the actual linked URIs.


### 1.3 Human-Readable with Links
=== 1.3 Human-Readable with Links ===
<syntaxhighlight lang="text">
<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]
[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>
</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]
Combines human readability with semantic web identifiers.
Combines human readability with semantic web identifiers.


## 2. Current SiDIF Reference Mechanism
== 2. Current SiDIF Reference Mechanism ==


### 2.1 Using 'it' Keyword
=== 2.1 Using 'it' Keyword ===
<syntaxhighlight lang="text">
<syntaxhighlight lang="text">
dad loves mom
dad loves mom
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'it' refers to the subject of the previous statement, bridging Object-Oriented concepts (this/self) with semantic web references.
'it' refers to the subject of the previous statement, bridging Object-Oriented concepts (this/self) with semantic web references.


### 2.2 Proposed Extension for Statement Parts
=== 2.2 Proposed Extension for Statement Parts ===
<syntaxhighlight lang="text">
<syntaxhighlight lang="text">
https://www.wikidata.org/wiki/Q76 is wikidata_url of subject
https://www.wikidata.org/wiki/Q76 is wikidata_url of subject
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Allows referencing any part of the previous statement.
Allows referencing any part of the previous statement.


## 3. Core Concepts and Bridging
== 3. Core Concepts and Bridging ==


### 3.1 Fundamental Elements
=== 3.1 Fundamental Elements ===
<syntaxhighlight lang="text">
<syntaxhighlight lang="text">
Entity - Object
Entity - Object
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</syntaxhighlight>
</syntaxhighlight>
These map to both OO and Semantic Web paradigms:
These map to both OO and Semantic Web paradigms:
- OO: Objects and their relationships
* OO: Objects and their relationships
- Semantic Web: Resources and their properties
* Semantic Web: Resources and their properties


### 3.2 Technology Integration Example
=== 3.2 Technology Integration Example ===
<syntaxhighlight lang="text">
<syntaxhighlight lang="text">
Person isA Concept
Person isA Concept
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</syntaxhighlight>
</syntaxhighlight>


## 4. Semantic Web Foundation
== 4. Semantic Web Foundation ==


### 4.1 Description Logic Basis
=== 4.1 Description Logic Basis ===
OWL/Description Logic components:
OWL/Description Logic components:
- Concepts (Classes)
* Concepts (Classes)
- Roles (Properties)
* Roles (Properties)
- Individuals (Instances)
* Individuals (Instances)


### 4.2 RDF/OWL Mappings
=== 4.2 RDF/OWL Mappings ===
<syntaxhighlight lang="text">
<syntaxhighlight lang="text">
# Class hierarchy
# Class hierarchy
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</syntaxhighlight>
</syntaxhighlight>


## 5. Design Decisions
== 5. Design Decisions ==


### 5.1 Reference Keywords Options
=== 5.1 Reference Keywords Options ===
1. Full form: subject/predicate/object
1. Full form: subject/predicate/object
2. Short form: s/p/o
2. Short form: s/p/o
3. Alternative: subject/link/object
3. Alternative: subject/link/object


### 5.2 Key Bridging Concepts
=== 5.2 Key Bridging Concepts ===
1. 'it' semantics bridges:
1. 'it' semantics bridges:
   - OO: self/this/me
   * OO: self/this/me
   - Semantic Web: subject reference
   * Semantic Web: subject reference


2. Statement part references enable:
2. Statement part references enable:
   - Metadata about relationships
   * Metadata about relationships
   - Integration with semantic web identifiers
   * Integration with semantic web identifiers
   - Technology-specific bindings
   * Technology-specific bindings


### 5.3 Relationship Considerations
=== 5.3 Relationship Considerations ===
<syntaxhighlight lang="text">
<syntaxhighlight lang="text">
# 1:n relations bring:
# 1:n relations bring:

Revision as of 09:45, 28 January 2025

SiDIF Extension Proposal

1. Statement Representations and Evolution

1.1 Natural Language Statement

dad loves mom

This represents the most basic, human-readable form of a statement. It contains:

  • subject (dad)
  • predicate (loves)
  • object (mom)

1.2 Semantic Web Identifiers

The same triple structure with Wikidata URLs: 

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

Now each part has a unique identifier in the semantic web space. The first version shows the raw syntax, while the second version shows the actual linked URIs.

1.3 Human-Readable with Links

[https://www.wikidata.org/wiki/Q76 Barack Obama] [https://www.wikidata.org/wiki/Property:P26 spouse] [https://www.wikidata.org/wiki/Q13133 Michelle Obama]

Barack Obama spouse Michelle Obama

Combines human readability with semantic web identifiers.

2. Current SiDIF Reference Mechanism

2.1 Using 'it' Keyword

dad loves mom
https://www.wikidata.org/wiki/Q76 is wikidata_url of it

'it' refers to the subject of the previous statement, bridging Object-Oriented concepts (this/self) with semantic web references.

2.2 Proposed Extension for Statement Parts

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

Allows referencing any part of the previous statement.

3. Core Concepts and Bridging

3.1 Fundamental Elements

Entity - Object
Link - relation between two objects

These map to both OO and Semantic Web paradigms:

  • OO: Objects and their relationships
  • Semantic Web: Resources and their properties

3.2 Technology Integration Example

Person isA Concept

# Technology binding options
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

4. Semantic Web Foundation

4.1 Description Logic Basis

OWL/Description Logic components:

  • Concepts (Classes)
  • Roles (Properties)
  • Individuals (Instances)

4.2 RDF/OWL Mappings

# Class hierarchy
Concept subClassOf owl:Thing    # Top concept (T with bar)
owl:Nothing                     # Bottom concept (inverted T)

# Instance relationship
Barack rdfType Person          # Individual -> Class relationship

5. Design Decisions

5.1 Reference Keywords Options

1. Full form: subject/predicate/object 2. Short form: s/p/o 3. Alternative: subject/link/object

5.2 Key Bridging Concepts

1. 'it' semantics bridges: 

  * OO: self/this/me
  * Semantic Web: subject reference

2. Statement part references enable: 

  * Metadata about relationships
  * Integration with semantic web identifiers
  * Technology-specific bindings

5.3 Relationship Considerations

# 1:n relations bring:
# Good: Flexibility for different tech bindings
# Challenge: Increased complexity
Person_Sparql is sparql_impl of subject
foaf is prefix of subject
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