Relationships between RELX, Scopus, Elsevier, and Scimago.

The block diagram illustrates the hierarchical and functional relationships within the academic publishing and bibliometric ecosystem. At the apex sits RELX Group, established in 1993, which serves as the parent corporation overseeing multiple information and analytics subsidiaries. 

Under RELX's umbrella, Elsevier, founded in 1880, operates as a major scientific publishing house. Elsevier, in turn, owns and manages Scopus, launched in 2004, which functions as a comprehensive abstract and citation database. 

The diagram then shows how Scopus's bibliometric data flows to Scimago, an independent research organization established in 2007. This data flow is represented in two final blocks: the raw bibliometric data (including citation information, publication metrics, journal rankings, and author profiles) that Scopus provides and the resulting Scimago outputs (such as the SJR Indicator, country rankings, institution rankings, and journal rankings), which are made freely available to the public. The structure uses color coding to distinguish between corporate entities (pink for RELX, blue shades for Elsevier and Scopus) and independent organizations (green for Scimago), while white blocks represent data and output products.