Abstract The semantic relationships between heterogeneous data sources are essential for a better understanding of the definitions in the field of Oil Production and Extraction (E&P). The Simple Knowledge Organization System (SKOS) 1 vocabulary can aid in the identification and generation of semantic links between glossaries of terms. We have developed an algorithm that automatically generates mappings with SKOS predicates. The algorithm has shown satisfactory results, especially for the skos:exactMatch predicate, which suggests that automatic methods can be used to improve the quality of terminological mappings.