The goal of this demo paper is to present OnToology Drag& Drop, a web application that seeks to facilitate the integration of several ontology development activities (documentation, validation, evaluation and shapes generation) without the need for installation of any software and without the dependency of git system. There is a variety of ontology development activities that are normally carried out in any development project, for example generating adequate documentation, designing and executing tests, or identifying the errors of the ontologies, etc. In addition, such activities might be repeated several times within a project lifetime when following iterative or incremental methodologies. To support these scenarios and align the ontology development with software practices, several tools have been developed in order to orchestrate the ontology development activities like OnToology [1] or VoCol [5]. These systems allows for continuous integration of ontology development artefacts integrating support for several activities by implementing new features or integrating existing tools. In both cases, the functionality is built on the basis of git systems. While this solution is robust for ontology maintenance and traceability of an ontology project, in some cases it imposes some requirements or overloads not desired by users looking for a more lightweight platform. For example, some users that are not handling the ontology in git repositories, or do not desire to make them public. For this reason, in this demo we present OnToology Drag&Drop1, a web application to generate ontology documentation, evaluate ontologies, run validation tests and generate SHACL Shapes2 from ontologies. OnToology Drag&Drop is available as a web interface where the user can drag and drop the ontology les and easily select which services to apply over each ontology without having to install any application or be tight to git systems.
As we have mentioned in the introduction, the power of this tool lies in being
able to easily run a set of utilities on our ontologies, simply by dragging them
into the web application. Speci cally, OnToologyD&D integrates the following
features provided by existing tools:
{ Generate ontology HTML documentation: through Widoco [
The presented application it is intended to facilitate the user the use of all these technologies, having a common point to access them and avoiding installation processes or handling several applications in di erent environments and without dependencies with git systems. It also saves valuable time since the application is designed to minimize the number of steps needed to select the features and generate the output.
The application allows the user to select any combination of tools to be run for one or more ontologies. When all the ontologies are uploaded, the system orchestrates the calls to all the applications and the output is generated as a zip le that contains a folder for each ontology and the services selected for them, in a short time (depending on the ontology number and sizes).
The ow of the application is simple, the user can choose an initial con guration of services that it want to run by enabling/disabling the application logos in the rst screen (Figure 1). After this, it can be dragged to the application the ontologies. Later on, the user can modify the con guration for each ontology and the change will be applied to all the ontologies uploaded after the change. The selection can be reverted any time before running the application for all the previously uploaded ontologies (Figure 2). If the user has selected Themis, (s)he is asked to upload a le with the tests, otherwise, template test will be generated. After this, simply click on the start button and the les will be generated.
OnToology Drag&Drop is a web application, developed with JAVA in its backend and HTML, CSS and JavaScript in its frontend.
The application works, in summary, as follows: when all the ontologies have been sent, the frontend, which has stored the services con guration selected by the user, makes a set of calls to the server to generate all the les. When all the tools have been executed, a ZIP le is generated.
On a technical level, the application works this way, the ontology, when it arrives at the server, is checked by a parser, if it is correct it is stored and the tools are later executed on it. The server executes Widoco, OOPS!, Themis or Astrea, as applicable, making calls to the REST APIs that provide those services or using Java programs, with an appropriate con guration to deal with the ontologies without the need for further worries by the user. After having generated all the les in a suitable folder structure, this is compressed and automatically downloaded to the user's computer. Widoco is executed through a Java ARchive (JAR), on the other hand OOPS!, Themis and Astrea are executed by web services. 4
During the demonstration of the application two ontologies will be uploaded, one in XML/RDF and another in TURTLE, all the available services will be selected for one of them, and for the remaining one a subset of them. In both cases, Themis will be selected in order to show the two facets of the service, the rst by uploading a le with our own tests and verifying the results; and the second by letting themis provide some sample tests.
In any case, attendants will be able to see from the beginning how to select the services to be run, how to upload the ontologies, how to modify the services independently for each ontology, how to upload Themis tests and, nally, they will be able to observe all the les generated thanks to the application.
The aforementioned demo can be seen in brief in the following video.3 5
With this alternative of OnToology, a lighter version of the app is provided with the focus on developments that are carried out by small teams or by single persons, and therefore do not use Git systems. In addition, the system is designed to be expandable, that is, it is implemented in such a way that adding a new service to the server is simple, since they are unconnected and without need to modify the code already written. To include a new system it is required to adapt the web interface in order to add the corresponding calls to that new application 3 https://www.youtube.com/watch?v=rKVeGFGRYhk or web service which implements the new functionality. The code is available for the community to use, modify or contribute on GitHub under an open license.4
As future lines of work it should be explore how to incorporate Widoco con guration options to the current features of OnToology D&D as well as the inclusion of other tools.