Data

1
Sharing Community Data, Services and Tools using
the EOS Clearinghouse
Robin Pfister, robin.g.pfister_at_nasa.gov, NASA
Goddard Space Flight Center, [phone] Keith
Wichmann, wichmann_at_gst.com, Global Sciences
Technology Inc, [phone] Michael Burnett,
mburnett_at_blueprinttech.com, Blueprint
Technologies, [phone] x249 Robert
Harberts, harberts_at_gst.com, Global Sciences
Technology Inc, [phone]
(http//eos.nasa.gov/echo)
The ECHO Solution

• Is an open system - Allows communities to share
  tools, services and data, extending available
  science resources from the science community, to
  the science community
• Accomplished through a metadata clearinghouse and
  service broker using application program
  interfaces (APIs) based on XML and web services
• Decentralizes tools for manipulating data and
  supports interoperability of distributed
  functions
• Approach is consistent with the trend toward a
  federated community with distributed,
  heterogeneous resources
• Supports adaptors to translate between different
  standards and protocols and those of ECHO
• Is a reusable, enabling framework that allows
  different data systems and services to work
  together
• The data model can be changed to support other
  communities
• Domain specific services (e.g. spatial searching
  mechanism) can be changed to support other
  communities
• Is available as Open Source

ECHO
Data Extensibility
Client Extensibility
C L I E N T A P I
D A T A A P I

• Graphical User Interfaces
• - Geared to interface directly with a user
• - May use ECHO account services, catalog
  services, order entry services as either guest or
  as a registered user (on behalf of their user)
• Machine-to-Machine Interfaces
• - Do not directly involve a person
• - Typically come from other existing system(s)
  using ECHO as a archive or from specialized GUIs
  that need regularly updated preprocessed staged
  metadata.

• New Partners
• - Participate with ECHO to provide Earth Science
  data by making metadata representing its holdings
  available for search and provides a mechanism for
  allowing a client to access the data holdings
• - Can establish policies for use of their data,
  and establish rules for access control on
  collections and data granules.
• New Collections/Data Types
• Access Mechanisms

Clearinghouse Catalog Browse Images
Order Service Brokers
Data Partner Context
Client Partner Context
FTP Request/Data
Data Partners
SERVICE API
FTP Req/Data
Clients
Partners
Clients
E C H O
Online, free distribution
E C H O
Quote (opt), Order,Status
Order Distribution (Quote is optional)
Register, Search, Order
Service Extensibility
Service Partner Context
Metadata
Types of Services - Data Services e.g.
collection, subsetting, - Search Services e.g.
gazetteer, thesaurus - Administrative Services
e.g. accounting
Data
Data
bind (brokered)
Service Partners
Acts Upon
Clients
E C H O
Data Partners
Service Views (based on user perspective) -
Service View - looking for a service first - Data
View - looking for data first and then finding
services for identified data
Service Interactions - Advertised - Context
Passing - Brokered - Order Options
find
publish
Service Input Data
bind (direct)