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January 2020

Changes to Derwent WPI Update numbering and the total number of annual DWPI updates

December 2019

Derwent World Patents Index: Manual Code revision 2020

December 2019

New Korean Patent Full-Text Database KRFULL released

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Critical information for users of Embase on STN

23. November 2016

Embase was reloaded on STN on November 13, 2016. The reload expands the content in Embase, providing more comprehensive retrieval of pharmacological, biomedical and medical devices information and improves your ability to retrieve precise information.

Key features of the reload include:

Expanded coverage. Embase now includes articles-in-press data and electronically-delivered journal article citations that have not yet been intellectually indexed. This data was formerly housed in Embase Alert (EMBAL), which will be removed from STN on February 28, 2017, and is no longer being updated. The expanded content in Embase provides you with the ability to streamline your searching - search one database instead of two – as well as more comprehensive retrieval, with the additional retrieval being the very latest information available.

Device Descriptors. This new segment in the Controlled Terms (/CT) indexing field allows you to quickly locate index entries specific to medical devices. It’s easy to locate this information: when present, Device Descriptors appear first in the Controlled Terms field.

Triple-linked indexing terms. This new type of linking between indexing terms provides a powerful tool for increasing search precision. It is now possible to link combinations of drug, disease and device terms via subheading terms chosen from a controlled list.

You can use triple links to zero in on very specific information, and make your review of search results more efficient. Imagine you were interested in finding articles in which muscle necrosis was discussed as a specific side effect of the drug atorvastatin. You can now find articles in which the indexer has specifically noted a relationship between atorvastatin and the specific side effect of muscle necrosis by searching:

= > s atorvastatin(P)side effect(P)muscle necrosis/CT

Use triple links to increase your search efficiency, and eliminate the possibility of false drops.

Less duplication. Some “MEDLINE Uniques” included in Embase were found to duplicate content indexed by Elsevier for Embase. The removal of these duplicates makes review of your search results more efficient.

Note to customers running alerts (SDIs) in Embase: Please carefully examine your SDI search strategies running under the ED update frequency to see if they include any of the following:

Controlled terms (/CT) linked to subheadings (e.g., <drug name>(L)side effect)

CAS Registry Numbers (included in the Basic Index)
Subject classification codes or names in the FS field (e.g.,
012 – Ophthalmology)
/CO – Company Name
/CN (alias /TN) – Chemical Name – Drug or Medical Device Trade Names
/NCT – Clinical Trial Number
/NP - Name of Product
/GEN – Gene Number

If so, we recommend changing from ED to UP using SDI EDIT to ensure continued comprehensiveness. Please contact the CAS Customer Center ( if you need assistance in updating your SDIs.

To support your Embase searching, we have updated its Database Summary Sheet ( Thank you for your continued support of STN.