## 4 Results
### Functionalities: Stakeholders Involved, Types of Services, and Types of Information
\begin{table}
\begin{tabular}{l c l} \hline \hline \multicolumn{1}{c}{**Platform**} & \multicolumn{2}{c}{**Functional Characteristics**} \\ \hline Tourism for All & \(\bullet\) & Search for accessible tourism offers \\  & \(\bullet\) & Search for accessible tourism information/communication \\  & \(\bullet\) & Ask for support or request more information about accessible tourism offers \\ \hline Hands to discover & \(\bullet\) & Search for accessible tourism information/communication \\  & \(\bullet\) & View explaining videos about system functionalities \\ \hline ENAT & \(\bullet\) & Search for accessible tourism information/communication \\  & \(\bullet\) & Search for upcoming events about accessible tourism \\ \hline  & \(\bullet\) & Search for accessible tourism offers \\  & \(\bullet\) & Search for accessible tourism information/communication \\ Tur4 all & \(\bullet\) & Create an individual profile, stating accessibility requirements/special needs \\ Portugal & \(\bullet\) & Search for upcoming events about accessible tourism \\  & \(\bullet\) & Interact with other users \\  & \(\bullet\) & Evaluation of tourism offers \\ \hline PREDIF & \(\bullet\) & Search for accessible tourism information/communication \\  & \(\bullet\) & Search for upcoming events about accessible tourism \\  & \(\bullet\) & Explore accessible tourism resources with an interactive map \\ \hline  & \(\bullet\) & Search for accessible tourism offers \\  & \(\bullet\) & Search for accessible tourism information communication \\ Reisen für Alle & \(\bullet\) & Create an individual profile, stating accessibility requirements/special needs \\  & \(\bullet\) & Explore accessible tourism resources with an interactive map \\  & \(\bullet\) & Evaluation of tourism offers \\ \hline  & \(\bullet\) & Search for accessible tourism offers \\ Jaccede & \(\bullet\) & Create an individual profile, stating accessibility requirements /special needs \\  & \(\bullet\) & Interact with other users \\  & \(\bullet\) & Evaluation of tourism offers \\ \hline  & \(\bullet\) & Search for accessible tourism offers \\  & \(\bullet\) & Create an individual profile, stating accessibility requirements /special needs \\  & \(\bullet\) & Interact with other users \\ Euans & \(\bullet\) & Create an individual profile, stating accessibility requirements/special needs \\  & \(\bullet\) & Interact with other users \\  & \(\bullet\) & Evaluation of tourism offers \\ \hline  & \(\bullet\) & Search for accessible tourism offers \\ Autism Travel & \(\bullet\) & Search for accessible tourism information/communication \\  & \(\bullet\) & Ask for support or request more information about accessible tourism offers \\  & \(\bullet\) & Interact with other users \\ \hline Getaboutable & \(\bullet\) & Search for accessible tourism offers \\  & \(\bullet\) & Interact with other users \\  & \(\bullet\) & Explore accessible tourism resources with an interactive map \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Functional characteristics of analyzed platforms. also enable registered users to interact with them. Similarly, _Autism Travel_ also permits registered users to communicate with each other. It is important to point out that registered users can be either part of the demand or supply. Finally, in relation to the evaluation, only a small number of the platforms (four out of ten) let users evaluate tourism offers. More specifically, while one of them only permits a more general evaluation, the others allow users to evaluate offers, taking into consideration more specific accessibility criteria (e.g., ramps, customer service, environment accessibility, facilities, parking, etc. ).