Information Interoperability and Application Model

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Information InteroperabilityandApplication Model

• Stefano Nativi
• THREDDS Project
• Boulder November 2001

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Information Interoperability

• Knowledge Sharing

• Common Application Model

• Common Encoding Rules

• Common Transfer Protocol

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Sharing a Common Application Model

• Application Model defines

• Application Data Content and Structures

• Application Operations Specifications for
  manipulating data

• 3 Main Sharing Approaches

• Sharing Standardised Reference Model (only
  partial)
• Example Dublin Core, OpenGIS, ISO 19100 series
  etc.

• Sharing a Common Application model knowledge
  (off-line knowledge)
• Example VisAD data model

• Discovering the Server Application model (on-line
  knowledge)
• Example RDF, XMI based ontology specifications

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Proposed Interoperability Approach

• Common Application Schema

• Sharing a Common Application model knowledge
  (off-line knowledge)

• Sharing Standardised Reference Model (only
  partial)

General Resource Model
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Proposed Interoperability Approach

• Common Application Schema Concepts

• Concepts Information Resource

• Reference Models Dublin Core Metadata Initiative

General Resource Model
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Proposed Interoperability Approach

• Common Application Schema Concepts

• Concepts GI Content

• Reference Models
• UNIDATA DIC
• Reference Models ISO 1900 Profiles
• OpenGIS Profiles

General Resource Model
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Proposed Interoperability Approach

• Common Application Schema Concepts

• Concepts DL Content

• Reference Models
• DELESE Model
• IMS Reference Model
• ADL Reference Model

General Resource Model
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Proposed Interoperability Approach

• Common Encoding/Decoding Rule

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Proposed Interoperability Approach

• Common Encoding/Decoding Rule Prioritization

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Proposed Interoperability Approach

• Common Transfer Protocol

• WDSL, SOAP, XML, HTTP, FTP, SMTP

WSDL
XML
SOAP
Bindings
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Proposed Interoperability Approach

• Data Interchange Paradigm

• Two main approaches
• Data Transfer Model datasets are predefined
• Interoperability Model dataset are composed
  on-the-fly.

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Extensible Scenario
THREDDS
Server
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THREDDS Internal Model

• THREDDS Interoperability Services Architecture

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THREDDS Internal Model

• Information Resource Domain

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Internal Model Context Schema

• Packages Overview

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Information Importing and Understanding
Content Domain
Resource Domain
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Resource Importing and Understanding
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Content Importing and Understanding
DL Domain
GI Domain
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GI Content I U
Common Reference to Internal Model Mapping
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DL Content I U
Common Reference to Internal Model Mapping
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Internal Information Model
Resource Domain
Content Domain
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Internal Information Model Resource Model
Elements
Qualifiers
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Internal Information Model Content Model
GI
DL
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Internal Information Model Content Model
Overall Schema
Components Topics
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Information Processing
Content Processing
Content Mapping
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HTML Documentation

• Application model
• file///C/Programmi/Together5.5/out/webpublish/TH
  REDDSApplSchema/index.html
• GI Model
• file///C/Programmi/Together5.5/out/webpublish/GI
  ReferenceModel/index.html

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Extensibility

• Scientific Community extensibility
• Domain extensibility
• Standardised Reference Model extensibility
• Encoding Languages extensibility
• Transfer Protocol extensibility