"Indexed" sounds like a verdict on quality. It is a narrower claim about one database, one collection and one moment, and every part of it can be checked.
What an indexing claim actually says
"Indexed in Scopus" sounds like a quality stamp. It is narrower than that, and more useful once read precisely: a named database decided to include a journal's content, against its own criteria, for a defined period. Every indexing claim carries three variables that a badge on a journal website leaves out:
- Which database. Scopus, Web of Science, DOAJ and MEDLINE apply different tests for different purposes.
- Which part of it. Web of Science has several collections, and PubMed contains more than MEDLINE.
- Which years, and what status today. All four can remove journals, so an old listing is history rather than current fact.
A listing is also a decision about the journal, not about any one article. It does not promise coverage when your paper appears, and it does not prove that the website quoting the claim belongs to the journal the database evaluated.
Scopus: selected by a board, then re-evaluated
Scopus is Elsevier's multidisciplinary database. Titles are assessed by its Content Selection and Advisory Board, international subject experts whose advice Elsevier follows. A journal must first meet the technical criteria: peer-reviewed content with a public description of the review process, regular publication with an ISSN registered with the ISSN International Centre, a publication history, English-language titles and abstracts, and a public publication ethics and malpractice statement. The board then judges journal policy, content, journal standing, publishing regularity and online availability.
Acceptance is not permanent. Titles are flagged for re-evaluation when validated concerns about publication standards are raised, or when Elsevier's data model detects outlier performance, such as unexpected patterns in publication activity, citations or author collaborations. During re-evaluation, new content stops flowing in. If a title is discontinued, content already indexed stays, except in what Elsevier calls exceptional cases of proven and severe unethical publication practice.
So presence is only the first question. The downloadable Scopus source title list shows coverage years, which can contain gaps, marks each title active or inactive, and includes a monthly-updated sheet of discontinued titles. Scopus also states that a change of title, ISSN, ownership or editorial oversight does not guarantee continued coverage.
Web of Science: always ask which collection
Clarivate's in-house editors, who it says have no affiliations to publishers or research institutes, select the Web of Science Core Collection using 28 criteria: 24 quality criteria, such as a verifiable ISSN, a clear peer review policy, identifiable editorial board affiliations and published content that follows the journal's declared policies, plus four impact criteria based mainly on citation activity.
Journals meeting the quality criteria enter the Emerging Sources Citation Index (ESCI). Those also meeting the impact criteria enter the Science Citation Index Expanded (SCIE), Social Sciences Citation Index (SSCI) or Arts & Humanities Citation Index (AHCI), and journals move between ESCI and those three as their impact changes. Clarivate currently evaluates new submissions on the quality criteria only and adds accepted journals to ESCI, whose journals are now also eligible for a Journal Impact Factor.
Two consequences follow. "Web of Science indexed" is ambiguous: Clarivate's free Master Journal List, which it calls the authoritative source for coverage, also lists specialty collections such as BIOSIS Previews and Zoological Record, so read which collection a record names. And status changes. During re-evaluation Clarivate places an "On Hold" notice on the Master Journal List and stops indexing new content. A journal that is then removed appears as an editorial de-listing in the monthly changes file, and content from the paused period is not backfilled.
Scopus vs Web of Science: which listing counts
Neither is better in the abstract. They are separate selections by different companies, so a journal can reasonably be in one and not the other. What counts is the listing named in the rule you are applying, whether a promotion criterion, a funder condition or a national assessment. If a rule only says "indexed journal", ask its owner which database, and which Web of Science indexes, it means.
| Scopus | Web of Science Core Collection | DOAJ | |
|---|---|---|---|
| Run by | Elsevier | Clarivate | DOAJ Foundation, a non-profit |
| Who decides | Content Selection and Advisory Board | In-house editors | DOAJ team and volunteer editors |
| Scope | All disciplines | All disciplines | Open access journals only |
| Main test | Technical criteria, then five categories | 24 quality criteria, plus 4 impact criteria | Basic criteria on openness, review, board and fees |
| Where to check | Source Title page or title list | Master Journal List | DOAJ journal search |
| After concerns | Re-evaluation, possible discontinuation | On Hold, possible de-listing | Re-evaluation, possible removal |
DOAJ: a transparency standard for open access journals
DOAJ answers a different question: is this a properly run open access journal? Its basic criteria are specific. Among them:
- all content free to read immediately under an open licence, with no embargo and no registration
- at least one ISSN confirmed at issn.org, with the journal name matching the ISSN record
- at least five research articles a year, and before applying either more than a year of publishing or at least ten open access research articles
- an editorial board, which DOAJ says should include at least five qualified editors, listed with affiliations
- at least two independent reviewers for each article, with an exception for arts and humanities journals
- every author charge stated on the website, or a statement that there are none
A DOAJ listing is good evidence of transparency, but it is not a ranking or a citation database, and DOAJ says it does not endorse using Impact Factors or other bibliometrics to judge journal quality. It treats long-term archiving and persistent identifiers as recommended rather than required, so check DOIs and preservation separately. It also removes journals that stop meeting its criteria. If your office's documents still treat open access itself as a warning sign, correct those open access myths at the same time.
PubMed, MEDLINE and Google Scholar are different claims
For medical journals the claim that matters is often MEDLINE, and it is easily blurred with PubMed. NLM describes PubMed as drawing on MEDLINE, which consists primarily of citations from journals selected for MEDLINE; on PubMed Central (PMC), which includes articles from journals NLM selected for archiving as well as individual articles collected to comply with funder policies; and on Bookshelf. A journal's articles can therefore appear in PubMed without the journal being indexed for MEDLINE.
To check, search the ISSN in the NLM Catalog and read the Current Indexing Status line. A MEDLINE journal shows "Currently indexed for MEDLINE"; a record reading "Not currently indexed for MEDLINE" does not support the claim, whatever PubMed shows. NLM also deselects journals, so rely on the current record rather than an old screenshot.
Google Scholar is different again. Its inclusion guidelines describe automated crawlers and parsers that pick up scholarly material meeting content and technical requirements. That makes it a discovery tool, not a selection process: appearing there shows a journal's pages can be found, and nothing more.
How to verify an indexing claim in ten minutes
Do this at the database, never from a logo on the journal's site.
- Copy the ISSN from the journal's website. Look it up in the ISSN Portal and confirm the title matches. Scopus, Web of Science, DOAJ and MEDLINE all require a registered ISSN, so a missing or mismatched one is already a finding.
- Search the database by ISSN, not title. Use the Scopus Source Title page, the Master Journal List, the DOAJ journal search or the NLM Catalog.
- Match the record to the website. Compare title, ISSN and publisher. Where the record links to a homepage, as DOAJ and NLM Catalog records often do, follow that link rather than one in an email. Hijacked journals copy real journals' titles, ISSNs and other metadata, so a matching name proves nothing alone.
- Read the status and dates. Active status and coverage years in Scopus; the collection and any On Hold notice in the Master Journal List; the indexing status in the NLM Catalog.
- Compare the claim's wording with the record. "Indexed in Web of Science" backed by an ESCI record is accurate but may not satisfy a rule requiring SCIE. "MEDLINE indexed" backed only by PubMed or PMC content is not accurate.
- Record what you found. Note database, collection, status and date checked, with a screenshot. Listings change, and the record at submission is what an office will ask for later.
A claim that fails at step 2 or 3 is not a detail to query with the journal. It is one of the red flags that justify stopping before a manuscript or fee goes anywhere.
Writing indexing into institutional rules
Shorthand such as "publications in indexed journals" leaves every hard case to whoever reads the rule. Four decisions close most gaps:
- Name the database and collection. For Web of Science, list the indexes that count, such as SCIE, SSCI, AHCI and ESCI, or a subset.
- Fix the moment that counts. Coverage on the publication date is the most defensible choice, because journals are added and discontinued on their own timetable.
- Decide discontinued cases in advance. Scopus normally keeps content indexed before a discontinuation, but once a journal is dropped, articles from the paused period onward are generally not added. Say which articles count.
- Name the evidence. Specify the source and require a dated record when an article is submitted for credit.
A clause you can adapt:
An article meets this criterion if, on its publication date, the journal was covered by [database and named indexes], as shown by [source]. The author supplies a dated record of that coverage when submitting the article for [purpose].
Indexing should be one input, not the whole test. A journal can pass every database check and still fail on fees, review or its board, so use it alongside a short journal triage for institutions, not instead of one.
Read the claim, then read the record
Translate every badge into a database, a collection and a date, then find the record that confirms all three. Directive Publications sets out its publishing standards for authors and its peer review process openly, and the same habit applies to any journal: compare what it says about itself with what you can confirm at the source.
Frequently asked questions
Is Scopus indexing better than Web of Science indexing?
Neither is better in general. They are separate selective databases run by different companies, with different evaluation processes and separate title lists, so a journal can be in one and not the other. The listing that matters is the one named in the rule you are applying, such as a promotion criterion or funder condition, and for Web of Science you also need to know which collection that rule means.
What does it mean if a journal is listed in DOAJ?
It means DOAJ reviewed the journal against its basic criteria for open access journals, which include immediate open access under an open licence, a confirmed ISSN, a named editorial board, independent peer review, and clearly stated author charges. It is a transparency standard, not a ranking or a citation database. DOAJ re-evaluates listed journals and removes those that no longer meet its criteria.
How can I verify a journal's Scopus indexing claim?
Copy the ISSN from the journal's own website and search for it on Elsevier's free Scopus Source Title page or in the downloadable Scopus source title list. Confirm that the title, ISSN and publisher match, that the title is marked active, and that its coverage years include recent content. The downloadable list also has a separate sheet of titles Scopus has discontinued.
Is Google Scholar an indexing database?
Not in the selective sense that applies to Scopus, Web of Science or MEDLINE. Google Scholar uses automated crawlers and parsers to pick up scholarly material that meets its content and technical guidelines, and it does not describe any editorial evaluation of journals. Appearing in Google Scholar shows that a journal's pages can be found, not that the journal passed a selection process.
Can a journal be removed from Scopus or Web of Science?
Yes. Both run re-evaluation processes and stop adding new content while a journal is under review. Scopus can then discontinue the title, and Clarivate can remove it from coverage and list it as an editorial de-listing. Content indexed before a Scopus discontinuation normally stays in the database, but once a journal is dropped, articles from the paused period onward are generally not added by either database.