I supose is because is related

Could you please clarify your answer in detail? Mª Angeles Zorrilla Lopez-Perea

I'm sorry. I mean it is true they are indexed, as they are all related.

ISI is now WoS (web of Knowledge)

I think Scopus uses the WoS, but WoS does not use Scopus. I would like someone to confirm what I mean.

Now it's quite clear to me Mª Angeles Zorrilla Lopez-Perea Thank you.

Dear Md. Inzamul Haque ,

There is no relation between them and no not all journals indexed by Clarivate are indexed by Scopus as well. The thing is that both indexes belong to two different companies. The indexing service Scopus (https://www.scopus.com/home.uri ) belongs to Elsevier (https://www.elsevier.com/solutions/scopus) and WoS (used to be ISI from Thomson Reuters) is nowadays owned by Clarivate (https://mjl.clarivate.com/home ). Clarivate has basically two databases: SCIE/SSCI (journals with an impact factor) and ESCI (journals eligible for an impact factor).

Both have their own criteria. Clarivate has more criteria (see for more information https://clarivate.com/webofsciencegroup/solutions/editorial/and https://clarivate.com/webofsciencegroup/journal-evaluation-process-and-selection-criteria/) than Scopus (https://www.elsevier.com/solutions/scopus/how-scopus-works/content/content-policy-and-selection).

The well-established journals are quite often indexed in both. However, there are numerous journals only indexed in either Scopus or in one of the Clarivate databases. Sometimes this is a choice of the journals (indexing costs money) and sometimes journals only manage to get indexed in Scopus and not in one of Clarivate’s databases because of the more stringent criteria used by Clarivate. However, I see also examples where Scopus discontinue a certain title while Clarivate keeps that journal indexed. It all depends on individual cases.

Best regards.

Thank you Rob Keller

Thank for this question intéressante

Thank you Md. Inzamul Haque for an interesting question, I agree with Dr Rob Keller

I agree with Prof. Rob Keller. But because the terms and conditions for ISI indexed journals are more difficult than Scopus ones, the ISI journals are usually indexed by Scopus.