DiGIR Overview

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DiGIR Overview
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Purpose and Scope of DiGIR

• Purpose
• Provides a single point of access (portal) to
  distributed information resources
• Resource a collection of data objects that
  conform to a common schema (DB records, XML
  documents)
• Distributed resources conform to federation
  schema
• Enables search retrieval of structured data
• Search for data values in context (semantics)
• Results as data set
• Makes location and technical characteristics of
  native resource transparent to the user

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Distributed Query System
Portal
Providers
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Multiple Systems
Portal
Portal
Portal
Portal
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Each System Entails

• Portal software
• Provider software
• Data standard
• Installation for each provider
• Configuration for each resource (DB)

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Providers Perspective
Provider
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Providers Perspectiveserve resources to new
portal
Portal 1
Portal 2
Portal 3
Portal 4
Resource 1
Resource 2
Resource 3
Resource 4
Resource 5
Provider server
Configuration file
Portal specific service
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Providers Perspectiveadd new resource
Portal 1
Portal 2
Portal 3
Portal 4
Resource 1
Resource 2
Resource 3
Resource 4
Resource 5
Provider server
Configuration file
Portal specific service
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Providers Perspective maintain service
software and configurations
Portal 1
Portal 2
Portal 3
Portal 4
Resource 1
Resource 2
Resource 3
Resource 4
Resource 5
Provider server
Configuration file
Portal specific service
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DiGIR Design Goals

• De-couple
• Protocol
• Software
• Semantics

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A DiGIR Architecture
UI
( UDDI )
Provider Query
Registry
Portal
Request Marshaller
Min Prov Info
Matching Providers
Query Engine
Register Provider
Provider
Provider Services
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Benefits of the Standard, Project, and
Architecture

• Developers can be independent
• Multiple versions of portal and provider software
  (probably based on OS/platform)
• Developers can collaborate
• Open source development on http//digir.sourceforg
  e.net
• Many portals to the meet the needs of many
  communities

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Emergent Architecture Distributed Query Systems
before DiGIR
Portal
Portal
Portal
Portal
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Emergent Architecture after DiGIR
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Emergent Architecture
Portal Integration Layer
DiGIR Protocol
Provider Layer