Access reusability is the characteristic of a dataset to allow easy and automatic access to the contents of a data source. In this study five levels have been standardised. Every level is weighted in order to provide a fair comparison. Next table shows description of the different levels. In any case the free (no cost) access is a must for being considered in this dimension. Otherwise punctuation would be 0. This is supported by Cook (Cook, 2009).
|Level 1. No web access or manual requestAccess to information requires a non-automatic approval process to access to the datasets or to fill manually a form.||
|Level 2. Web Access URL with registration or with web interactionAccess to information via the web, but it requires user interaction to select the data source.||
|Level 3. Web access or unique URL parametersAccess to information via the web, and it is possible to access to the dataset individually, or through a unique URL, or by specific parameters in the query call.||
|Level 4. Web Access unique with parametersAccess to information via the web, and it is possible to access individually to each data inside the datasets, or through a shortened URL, or by specific parameters in the query call and includes the date, the version, or the last update.||
|Level 5. API or query languageAccess to information provides access to specific data of the dataset, either by calling a documented API or through a query language of data sources (I.e. SPARQL).||