Google released its 2015 Google Scholar Metrics data, which estimates the visibility and influence of journals and selected conferences based on citations to articles published in 2010-2014.
The primary measure is the h5-index, defined for a publication venue as the largest number h such that h articles published in it in the last five years have at least h citations each. A related measure, h5-median is also computed as the median number of citations for the articles that make up its h5-index.
The Journal of Web Semantics 2015 h5-index was 36 and its h5-median was 56, putting the journal at 14th in the Google-defined Databases and Information Systems category and 17th among all venues whose names contain one of the words web, semantics, knowledge, intelligence or intelligent.