cross-search aggregation service management: a sketch of a habitat in the repository ecology
DESCRIPTION
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Cross-Search Aggregation Service Management: a sketch
of a habitat in the repository ecology
Author: Phil Barker <[email protected]>, Heriot-Watt University
Last modified: June 2007.
See also: http://www.icbl.hw.ac.uk/publicationFiles/2007/CrossSearchEcology/index.html
This work is licenced under the Creative Commons Attribution 2.5 UK: Scotland License. To view a copy of this licence, visit http://creativecommons.org/licenses/by/2.5/scotland/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California 94105, USA.
The PerX Use Case
An Engineer is engaged in some work...
attentionTask
Engineer
The PerX Use Case
An Engineer is engaged in some work, when suddenly they require further information to complete their task
attentionTask
Engineer
?
attentionTask
Engineer
The PerX Use Case
So the Engineer goes to their computer and performs a search on the PERX website.
!
See http://www.icbl.hw.ac.uk/perx/
info
rmat
ion
attentionTask
Engineer
The PerX Use Case
The PERX systems cross searches a series of repositories of interest and as a result the engineer finds the information needed to complete the task effectively.
The world is made a better place.
IE Architecture view
Perx aggregator
Data Data Data
Data
User interface
DataService Registry
See http://www.ukoln.ac.uk/distributed-systems/jisc-ie/arch/
The website used by the Engineer is a presentation layer connection to PerX. The PerX service is an aggregator in the fusion layer of the IE architecture, it cross searches information about resources which is held by several services in the provision layer. PerX knows the nature of these content provider services and how to search them because of data provided by a service registry which is part of the shared infrastructure. Other shared services (not shown) may be involved in delivering the resource.
Ecology View : PerX Landscape analysis
See http://www.icbl.hw.ac.uk/perx/sharedservices_IESR.htm
Perx aggregator
Data
User interface
Data
Admin interface
PerxService Manager
Service Registry
The PerX service manager needs to identify suitable data providers and set up connections to them using the Perx Admin INterface (PAIN).The Service Registry does not (yet) contain reliable information to help him. No machine to machine connection is implemented.
Perx aggregator
Data
Information resources
EngineeringCommunity
User interface
Data
Admin interface
InformationCommunity
info
rmat
ion
informatio
n
information
informationEngineer
Data providerService Manager
PerxService Manager
However, the PerX service manager has access to a community of people active providing information resources for engineers (for example the service managers of data providers).
This community is in contact with the Engineering community in order to ascertain the needs of Engineers and so can provide information on providers of data about information resources relevant to engineers.
Ecology View : PerX Landscape analysis
See http://www.icbl.hw.ac.uk/perx/sharedservices_IESR.htm
Perx aggregator
Data Data Data
Data
Information resources
User interface
Data
Web site
Data
Admin interface
InformationCommunity
info
rmat
ion
informatio
n
information
Data providerService Manager
info
rmat
ion
PerxService Manager
Ecology view: PerX Setup & Maintenance
In order to set up and maintain a cross search of a data provider the PerX service manager uses information from the data providers website, other resources provided by the information community, and ultimately, a great deal of direct contact with the data provider service manager.
See http://www.icbl.hw.ac.uk/perx/setupmaintenance.htmand http://www.icbl.hw.ac.uk/perx/casestudyoxford.htm
PerX habitat : the full(?) picture
Perx aggregator
Data Data Data
Data
Information resources
EngineeringCommunity
User interface
Data
Web site
Data
Admin interface
Data
InformationCommunity
info
rmat
ion
info
rmat
ion info
rmat
ion
informatio
n
information
information
attentionTask
Engineer
Data providerService Manager
info
rmat
ion
PerxService Manager
Service Registry
Points to investigate further
• Are there any other players that should be identified?• What is the nature of the information that is passed to the PerX service manager?• Through what channels is this information passed?• What are the “abiotic” factors and what effect do they have on the entities and their
interactions?• The service registry and the information communities perform similar functions (both
provide information required to set up cross searches): how do they interact?• ...