The ADEPT Middleware Effort

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The ADEPT Middleware Effort

• Greg Janée

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ADEPTs middleware effort

• Broad goals
• distributed digital library for georeferenced
  information
• DL interoperability
• ADEPT-specific goals
• interface to library
• infrastructure for information creation,
  organization, management publishing

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Recent activities

• Distributed, peer-to-peer architecture
• multiple, local servers inter-server
  cooperation
• central collection discovery service
• Bucket metadata framework
• representation utilization of metadata mappings
• Personal collections
• lightweight utterly heterogeneous totally
  automated
• create, import, categorize, manage items
• Miscellaneous new features
• collection groups, load balancing, ...
• Packaged documented

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Middleware architecture
client
uniform client services item-level metadata
mapped to search buckets (high-level, typed
fields with rich search semantics) uniform
collection- level metadata includes coverage
histograms plugins support common
collection implementations
collection discovery service
middleware
RDBMS
Z39.50
proxy
collection
collection
personal
item
item
item
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The interoperability landscape
ADEPT
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Interaction with NSDL
metadata repository
harvest
OAI
portal
2. harvest interpret
3. h i
metadata
ADEPT
1. map
ADEPT collection discovery
ADEPT client
ADEPT
per collection provider
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Next steps

• In 6 months or less
• Complete middleware collection discovery
  service
• Stop development
• diminishing returns
• extreme generality of limited use to ADEPT
• Then
• Focus on bringing GIS functionality into the
  library
• necessary for effective use
• ADL has almost none corollary ADL is unusable
• interfaces, tie-ins, lite tools, indexing
  techniques
• More information
• http//www.alexandria.ucsb.edu/gjanee/middleware/

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Gazetteer protocol

• Streamlined for specific to gazetteers
• Supports 5 fundamental queries
• name, footprint, class, relationship, identifier
• Lightweight
• 80/20 rule used throughout
• accommodates differing implementations
• simple services that can be combined into
  higher-level services
• Buzz-compliant HTTP, XML, schemas, SOAP, GML
• More information
• http//www.alexandria.ucsb.edu/gjanee/gazetteer/