Barry Bishop

1
Large Knowledge Collider
Architecture
Creative Commons License allowed to share
remix, but must attribute non-commercial
2
What is LarKC?
Large Knowledge Collider
3
Simplified Overview
4
LarKC Architecture
Application
Pipeline Support System
Plug-in Registry
Data Layer API
Data Layer
RDF Store
RDF Store
RDF Store
RDF Doc
RDF Doc
RDF Doc
5
LarKC Plug-in Types

• Identify
• Responsible for finding resources to be used in a
  given pipeline
• Information sets are for example
• RDF documents on the Web
• Named graphs in a triple store
• Natural language documents
• Examples
• Sindice Triple Pattern Query ? RDF Graphs
• Google Keyword Query ? Natural Language
  Document
• Triple Store SPARQL Query ? RDF Graphs

Identifier
Query
CollectionltInformationSetgt
6
LarKC Plug-in Types

• Transform
• Given some data or a query, transform it to a
  different representation
• Examples
• SPARQL Query ? Keyword Query
• Natural Language Document ? RDF Graph
• RDF Graph ? RDF Graph (foaf ontology to facebook
  ontology)

Transformer
Query
CollectionltQuerygt
Transformer
InformationSet
InformationSet
7
LarKC Plug-in Types

• Select
• Responsible for selecting a subset of a specified
  set of statements
• Examples
• Collection of RDF Graphs ? Data Set (Merged)
• Collection of RDF Graphs ? Labeled Set (Subset)

Selecter
SetOfStatements
SetOfStatements
8
LarKC Plug-in Types

• Reason
• Responsible for performing reasoning on a given
  set of statements
• The output depends on the kind of query
• Examples
• SPARQL only (no inference)
• RDF/RDFS/L2 inference
• Urban shortest path calculator
• CyC

VariableBinding SetOfStatement BooleanInformationS
et
Reasoner
SPARQL query
9
LarKC Plug-in Types

• Decide
• Responsible for constructing a pipeline and
  making decisions about its execution
• Examples
• Scripted Decider (predefined pipeline)
• Meta-reasoning Decider (dynamic pipeline based on
  metadata)

SPARQL query QoS params
VariableBinding SetOfStatement BooleanInformationS
et
Reasoner
10
LarKC Plug-in Descriptions
SAWSDL WSMO WSMO-Lite

• Functional
• Non Functional
• Behavioral

11
LarKC Pipeline Support System
Plug-in Registry
Decider
Pipeline Support System
12
LarKC Local Execution
Plug-in Registry
Pipeline Support System
Decider
13
LarKC Remote Execution
Plug-in Registry
Pipeline Support System
Decider
14
WebSPARQL Pipeline

• First LarKC prototype
• A SPARQL endpoint for the Semantic Web
• Aim
• To illustrate the APIs
• To explore Anytime models for LarKC
• Utilizes the Sindice system for finding relevant
  RDFGraphs for a particular SPARQL Query

15
LarKC WebSPARQL Demo
Plug-in Registry
Pipeline Support System
Simple Anytime Decider
16
Questions?
Creative Commons License allowed to share
remix, but must attribute non-commercial