Information Technology Reference
In-Depth Information
Network-related QoS. This represents the QoS mechanisms operating in
the transport network that are independent of the Web service. They can
be measured by network delay, delay variation, and/or message loss.
Owner. A person or organization to which a particular WSMO element
belongs.
Performance. This represents how fast a Web service request can be com-
pleted. According to [112], performance can be measured in terms of
throughput, latency, execution time, and transaction time. The response
time of a Web service can also be a measure of the performance. High-
quality Web services should provide higher throughput, lower latency,
lower execution time, faster transaction time and faster response time.
Publisher. The entity responsible for making the element available. Exam-
ples of dc:publisher include a person, an organization, and a Web service.
The Dublin Core specification recommends that, typically, the name of a
dc:publisher should be used to indicate the entity.
Relation. A reference to a related element. Recommended best practice is
to identify the referenced element by means of a string or number con-
formingtoaformalidentificationsystem.
Reliability. This represents the ability of a Web service to perform its
functions (that is, to maintain its Web service quality). It can be measured
by the number of failures of the Web Service in a certain time interval.
Rights. Information about rights held in and over the element. Typically,
dc:rights will contain a rights management statement for the element, or
reference a Web service providing such information. Rights information
often encompasses intellectual property rights (IPR), copyright, and var-
ious property rights. If the rights element is absent, no assumptions may
be made about any rights held in or over the element.
Robustness. This represents the ability of the Web service to function
correctly in the presence of incomplete or invalid inputs. It can be measured
by the number of incomplete or invalid inputs for which the Web service
still functions correctly.
Scalability. This represents the ability of the Web service to process multi-
ple requests in a certain time interval. It can be measured by the number
of requests resolved in a certain time interval.
Security. This represents the ability of a Web service to provide authentica-
tion (entities (users or other Web services) that can access a Web service,
and their data, should be authenticated), authorization (entities should
be authorized so that only they can access the protected Web services),
confidentiality (data should be treated properly so that only authorized
entities can access or modify the data), traceability/auditability (it should
be possible to trace the history of a Web service after a request has been
serviced), data encryption (data should be encrypted), and nonrepudiation
(an entity cannot deny requesting a Web service or data after the fact).
Source. A reference to an element from which the present element is de-
rived. The present element may be derived from an element referenced in
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