Review Comment:
This paper proposes the Web Service Ontology (WSO) ontology which facilitates the semantic description of web services providing geospatial data, also known as Open Geospatial Consortium Web Services (OWS). More precisely, the focus is on describing a particular type of OWS, namely Web Feature Services. The authors reuse a variety of existing ontologies (e.g., OWL-S, vCard) to create their ontology.
This manuscript was submitted as 'Ontology Description' and therefore was reviewed along the following dimensions:
(1) Quality and relevance of the described ontology (convincing evidence must be provided).
Low.
The work of the authors has a very narrow scope (that of semantically describing a particular type of geospatial services). This raises the question of relevance, i.e., whether there is a need for such an ontology at all. The paper is unclear about such need – e.g., by pointing to a high number of services, or a large user base that could benefit from the automation granted by this ontology. There is also no evidence of (wide-spread) usage of the ontology outside the group of authors: the current application of the ontology focuses on its use for describing three WFS.
Section 2 on Background only weakly argues for the novelty of the presented work, focusing primarily on the issue of grounding these services. This by itself does not constitute a good enough motivation for building a new ontology rather than reusing and extending other similar efforts such as those in references [6, 14, 23].
(2) Illustration, clarity and readability of the describing paper, which shall convey to the reader the key aspects of the described ontology.
Low.
The paper is longer than the typical ontology description paper, and contains far too many details while omitting the key aspects of the ontology (e.g., size, complexity class, design patterns used if any). In particular, Section 3 on methodology is practically a survey of various ontology engineering methodologies, with most details being unnecessary for the audience of this journal (e.g., Uschold’s three methods for describing class hierarchies).
The overall quality of the paper is under the standard expected for a journal submission: several unsolved references in the text (“[?]”), incomplete references (e.g., [14]), several typos and text paragraphs that are hard to understand. It is also rather unusual that the paper includes large portions of Turtle syntax and several SPARQL queries. These should be reduced for demonstrating aspects of the ontology that are of interest from a research perspective.
Taking these considerations into account, the paper is, at this point not suitable for a journal venue. A workshop or specialised conference might be more suitable for this material.
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