Indexing & Archiving
Ensuring long-term discoverability, accessibility, and scholarly permanence is one of the highest priorities of the Clinical Journal of Obstetrics and Gynecology (CJOG). This page provides a complete overview of the journal’s indexing coverage, digital preservation strategy, metadata standards, citation practices, and long-term archiving mechanisms.
Indexing Philosophy
CJOG follows an indexing strategy centered around global discoverability, interoperability, metadata accuracy, and long-term scholarly visibility. Our indexing philosophy prioritizes:
- Ensuring that each article is permanently accessible through stable identifiers and repositories.
- Maximizing search discoverability across scholarly, medical, and interdisciplinary indexing services.
- Using best practices for citation metadata (Crossref, Dublin Core, Schema.org, and OAI-PMH).
- Complying with global standards for open access publishing, transparency, and digital preservation.
- Providing consistent indexing metadata to universities, libraries, and citation databases.
Current Indexing Coverage
Based on historical records of the former website and CJOG’s current publishing frameworks, the journal is indexed and/or discoverable in the following repositories, aggregators, and indexing databases:
| Indexing Service | Description |
|---|---|
| Google Scholar | Automatic crawling and indexing of all CJOG articles. Articles are discoverable through author names, titles, DOI metadata, and institutional repositories. |
| Index Copernicus (ICV: 96.27) | The journal historically held an Index Copernicus Value (ICV) of 96.27. Articles are cataloged under medical and clinical research disciplines. |
| WorldCat (OCLC) | Library indexing through OCLC partners ensures global library visibility for CJOG metadata. |
| Crossref DOI Registry | All accepted articles receive a registered DOI. CJOG participates fully in Crossref metadata submission including reference linking, ORCID linking, and Crossmark updates. |
| Semantic Scholar | AI-powered indexing platform that crawls open access articles, ensuring machine-readable discoverability. |
| CORE (Open Access Research Aggregator) | Harvests metadata using OAI-PMH to ensure inclusion in the global open-access research ecosystem. |
| OpenAIRE | Compatibility with the European repository ecosystem for open-access literature and funded research outputs. |
| Scilit | A scholarly database indexing millions of open-access articles, including CJOG entries. |
| J-Gate | An electronic gateway for Indian academic institutions and medical libraries, indexing CJOG content. |
DOI Assignment and Metadata Standards
Every published article is assigned a Crossref DOI, enabling:
- Permanent citation links
- Automated indexing in Crossref-partnered databases
- Reference linking and citation tracking
- Machine-readable metadata ingestion for libraries, research tools, and search engines
CJOG submits metadata under:
- Crossref Schema (XML)
- OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting)
- Dublin Core Metadata Set
- Schema.org JSON-LD (for search engines and knowledge graphs)
- OpenURL linking frameworks
Digital Preservation & Archiving
Long-term preservation of published content is achieved through redundant digital archiving and repository strategies. CJOG utilizes a multi-layered preservation system:
1. Publisher-Level Archiving
All articles are preserved on the primary publishing servers with redundant server backups, daily database integrity checks, and distributed storage infrastructure.
2. Third-Party Archiving Services
CJOG participates in external preservation frameworks to ensure content survival even in catastrophic scenarios:
- Portico-Compatible Archiving (Publisher integration in progress)
- LOCKSS (“Lots of Copies Keep Stuff Safe”) – library-based distributed preservation
- CLOCKSS – institutional network built for dark archiving and long-term retrieval
- Zenodo/OpenAIRE for dataset preservation where applicable
3. Author & Institutional Repositories
Authors are permitted and encouraged to deposit accepted manuscripts and publisher PDFs in:
- Institutional repositories
- National health repositories
- Subject-based repositories (e.g., MedRxiv for preprints, subject to policy)
- Funding-mandated repositories
All deposits must include the CJOG DOI and proper citation format.
OAI-PMH Metadata Harvesting
CJOG supports automated metadata harvesting through OAI-PMH. This enables:
- Library systems to ingest CJOG metadata automatically
- Indexing databases to harvest updated citations and abstracts
- Repository interoperability with global networks
OAI Base URL: http://obstetricgynecoljournal.com/index.php/cjog/oai
Archiving Formats
For redundancy and future-proofing, articles are archived in:
- PDF/A (ISO-standard archiving format)
- XML (Crossref, NLM/JATS-compatible)
- HTML files with embedded metadata
Metadata Verification & Quality Control
CJOG performs structured metadata audits every quarter to ensure:
- Accuracy of author names, ORCID links, and affiliations
- Correct DOI registration and resolution
- Proper reference linking (Crossref Event Data, cited-by tracking)
- Correct XML/JATS schema validation
- Accessibility standards compliance, including alt-text and descriptive metadata
Impact of Indexing on Authors
Comprehensive indexing and archiving provide major advantages for authors:
- Higher visibility and citation probability
- Increased global readership
- Compliance with funder requirements
- Guaranteed long-term discoverability even if the publisher website changes
- Stable links for CVs, grant applications, and institutional reports
Commitment to Transparency
CJOG is committed to providing full transparency regarding indexing coverage. Indexing lists are updated regularly and expanded as the journal is accepted by additional services.