Information Technology Reference
In-Depth Information
Figure 7.1
The infrastructure and application scenarios of service-oriented science.
computational resources into uniformed interfaces, such that
users can access them without owning or even knowing their
internal workings.
Security . Privacy, integrity, authentication, and authorization are
key issues in accessing virtualized services. The infrastructure
needs to have a mechanism to explicitly define security policies
and enforce them during run-time.
Metadata . SOS encourages sharing and collaboration in a multi-
disciplinary and cross-institutional manner, such that scientists
can obtain data and computation from the Web instead of the lab
and undertake experiments at a Web scale. Therefore, it is
important that users understand not only the syntax but also
the semantics of the services.
On top of the aforementioned infrastructure, SOS applica-
tions usually need to create, discover, compose, and publish
services and also provide community support. We will explain
them one by one.
Create . We have to create Web services wrapping data, program,
instruments, and computation resources. There are open-source
software libraries such as Apache Axis [159] and CXF [160]. As
we have mentioned, scientific applications usually have special
requirements such as metadata and security, and therefore, more
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