Enhancements for INSPEC INSPEC has been reloaded to incorporate several enhancements. The database features now Numeric Property Search (NPS) for 59 physical or chemical properties. NPS is available in many files across STN and enables numeric multi-file searching. Source information has been enriched with the Ringgold Identifier for organizations and the Digital Object Identifiers (DOI) for the full-text of referenced items. Also, more than 2.6 Million citations are now available in INSPEC with about 300 Thousand added each year.