Last updated: 29 April 2026 · 7 min read · Audience: Authors, students, early-career researchers · Reading level: Introductory
Indexing refers to the inclusion of a journal's metadata — and frequently its abstracts — in a database that researchers consult to discover scholarly literature. A journal that is well indexed is materially easier to find, cite, and evaluate than one that is not.
Why indexing matters
- It substantially increases the discoverability of individual articles.
- It supports the calculation of citation metrics and other bibliometric indicators.
- It is frequently used by hiring, funding, and tenure committees as a credibility signal.
- It assists librarians in collection-development decisions.
Categories of indexing services
| Category | Function |
|---|---|
| Citation databases | Track citations between articles to support bibliometric analysis |
| Abstracting services | Provide structured summaries searchable by topic, author, and keyword |
| Subject-specific indices | Organise literature within a particular discipline |
| Open access registries | Catalogue journals operating under open access models |
| General academic search engines | Aggregate scholarly content across publishers |
How journals become indexed
Indexing services apply their own selection criteria, which typically include editorial quality, regularity of publication, ethical compliance, and adherence to disciplinary norms. Application is initiated by the journal and may take months or years to be evaluated.
Key points
- Indexing makes scholarly literature discoverable and citable.
- Different categories of index serve different evaluative purposes.
- Inclusion is selective and based on documented criteria.
- Independent verification of indexing claims is recommended.
Frequently asked questions
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Editorial enquiries
Questions about this guide or about preparing a manuscript for submission may be directed to the editorial office. Where a query relates to a specific journal in the portfolio, please indicate the journal abbreviation in your message.
Email: editor@ep-journals.org