Five Challenges for the Semantic Sensor Web
Review 1 by Christoph Schlieder:
The article identifies five challenges of the Sensor Web, that is, the combination of sensor networks with Web services, and describes how Semantic Web technologies contribute to solutions. Not working myself in this field, I gained an interesting overview of current research activities.
Some of the challenges appear also in other areas to which Semantic Web technologies have been applied. For the issue of data integration, the authors point to a number of aspects that are unique to the sensor web use case (e.g. querying of stream-based sources). However, it becomes less clear in what respect the challenges of data quality and rapid application development are specific to semantic sensor networks.
The authors clearly explain how today's Semantic Web technologies contribute to solving a variety of problems of sensor networks. What about effects in the inverse direction? Is there a specific way in which the Semantic Web needs to evolve to suit the needs of semantic sensor networks? Perhaps this could be addressed in the conclusion.
p.2 Section 1 ends with "We will now review some of the most relevant challenges …" and section 2 starts with "… we review some of the most relevant open challenges …". This redundancy could be avoided.
p.4. "different applicable areas" -> "different application areas"
Review 2 by Werner Kuhn:
This is a very good overview of substantial challenges in the sensor web. The limited space does not allow much more background, of course. Still, a few more references would be appropriate, for example on:
- SensorMap (second occurrence)
- DSS for environmental management
- recent work on sensor semantics and ontologies from the GIScience area, as for example published in GeoS (a shameless plug!).
- eliminate as many "etc." as you can; they are mostly not needed, especially if there is a "such as" or similar before them
- work done *on* (not in) this topic
- drop "the following dimensions, among others:" following "All Sensor Web efforts are characterized by"
- "by means of the usage of" should just be "by means of"
- "abstraction level *at* (not in) which"
- "same applies with respect to" should just be "same applies to"
- "some others do not" should just be "some do not"
- "Other amount of work" should just be "Other work"
- "and examples of approaches" should be "and an example of approaches"
- "work is being done on" (not in)
- "definition of data according..": should this be annotation rather than definition?
- "open challenges" should just be "challenges".