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WORKSHOP ON INFORMATION SYSTEMS ARCHITECTURES
Information / software architectures based on Content Management Systems (CMS):some examples with Drupal
Valeria Pesce (GFAR)
IAALD 2010 side-eventSupAgro, Montpellier, France26 April 2010
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CMS + external sources + commodity services
AgriFeeds (www.agrifeeds.org)
Information architecture: individual sources “commodity services”
Software architecture: CMS to harvest, store and manage content
CMS + custom code for advanced filtering and custom feeds
“Commodity services”: feed generators like Feedburner, Google API for calendars, widgets exploiting the APIs of various popular RSS readers
Processing - search/display- sources commodity services
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AgriFeeds architecture
Organization
Regionalnetwork
news events
newsevents
websitewebsite
websitewebsite
harv
esti
ng
harv
esti
ng
meta
data
m
eta
data
fi
lteri
ng
filt
eri
ng
AGGREGATED VIEW
FeedBurner
Commodityservices
CMS
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Example: Upcoming Forestry Events
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Item level: semantics come from the sources
Future versions: automatic indexing with controlled vocabularies
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Feed level: semantics come from the system
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Advantages
Information architecture: Relevant contents are stored and indexed without
human intervention Metadata standards are exploited
Software architecture: No need to write code from scratch No need to maintain code: relies on an active
community of developers
Complies with good practices in IM: re-use, re-usability, re-packaging, use of
standards
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Challenges
Information architecture: Depends (partially: the basic functionalities rely
on the CMS) on the functioning and continued availability of the commodity services
Quality depends on the quality of the sources Software architecture:
Relies on the continued maintenance of the CMS The custom code needed to extend the basic
CMS functionalities needs to be maintained
1st version: 30% custom code 2nd version: 15% custom code
NEXT VERSION: >> 1% CUSTOM CODE
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CMS as integrated solution
AgriDrupal(http://aims.fao.org/community/group/agridrupal)
Information architecture:- external sources - locally managed contents
Software architecture:• CMS to manage any kind of information using any metadata set
• CMS to interface web services, APIs, RDF, XML…
Coherent management metadata Model / content model
- search/display- exports
CMS as an “information management tool”CMS as an “information hub”CMS as a pool of specialized solutions
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CMS for specialized functions
Through an extended use of metadata and workflows, a CMS can perform the functions of specialized software.
Example of document repository management in Drupal
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Advantages
Information architecture:Both external and local contents managed through metadata models and content models flexibility and adaptability to standards
Software architecture: No need to write code from scratch No need to maintain code: relies on an active
community of developers One tool to manage everything
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Challenges
Information architecture: Depends (partially) on the availability of good
sources Common vocabularies are needed
Software architecture: Relies on the continued maintenance of the CMS Functionalities limited to the functionalities of the
CMS The custom code needed to extend the CMS
functionalities needs to be maintained Specialized functions will not be as specialized as
in specialized software