Enabling FAIR Research in Earth Science through Research Objects
Table 4: Similarity Evaluation for context with two documents
['[BOLD] Similarity evaluated on categories in the path  [BOLD] Similarty based on', '[BOLD] Similarity evaluated on categories in the path  [BOLD] p@1', '[BOLD] Similarity evaluated on categories in the path  [BOLD] p@5', '[BOLD] Similarity evaluated on categories in the path  [BOLD] p@10', '[BOLD] Similarity evaluated on categories in the path  [BOLD] p@15', '[BOLD] Similarity evaluated on categories in the path  [BOLD] p@20']
We relaxed this definition by considering as similar objects those annotated with a category falling in the subtree whose root is the least common subsummer LCS wu1994verbs of the categories associated with the reference research objects. For example, the LCS of Marine Biology and Ocean Exploration is Oceanography. Similarly to experiment 1 this relaxed definition of similarity is aimed as an indicator of the variety of related research objects that the similarity measure generates. Nevertheless, the use of semantic metadata and text does not seem to harm, to a large extent, the precision of the similarity measure. In this experiment we also validated that the use of the semantic metadata without text produces, although smaller, similar results to the ones that we obtain when we have textual descriptions. The precision values of the similarity metric based on the LCS subtree are a good indicator of the usefulness of the metric in the recommender system when there are more than one research object in the recommendation context.