NPG Case Study: CrossRef Implementation

Howard RatnerCTO, Nature Publishing Group

February 2002

NPG Publishing Program

NPG: Nature Journals Division (14)

Nature Magazine (Weekly) Nature Research Journals Nature Reviews Journals

NPG: Specialist Journals Division (28)

Oncogene, British Dental Journal, Cancer Gene Therapy, etc.

NPG: Reference Division (3+) Encyclopedia of Life Sciences Encyclopedia of Astrophysics

Timeline Winter 1998 Helps found CrossRef Spring 2000 Begins reference linking

programming/testing December 2000 Deposits/queries/posts/links

- nature only January 2001 Deposits/queries/posts/links

- all nature-branded journals March 2001 Queries/posts links

- EAA & ELS reference products July 2001 Launches Advance Online

Publication (AOP) Program January 2002 Deposits/queries/posts/links

- Specialist Journals

Reference Linking Program

The Deposit Issue-based AOP-based

The Query Initial Posting Updates

The User Experience

QuarkConversion(supplier)

3B2Extraction(supplier)

Full TextSGML

DOI Handle

CrossRefMDDB

DOI/URL

Metadata

TransformSGML

(ContentExplorer)

TransformSGML

(ContentExplorer)

DOI/URL pair forimmediate deposit

1 2a

ProductionDatabase

Issue Post Date(Weekly/Monthly)

CrossRefDeposit Batch

File

Upload todeposit.crossref.org(Content Explorer)

3

2b

AOP Post Date(Weekly)

HandleDeposit File

Upload to Handle(Content Explorer)

The Deposit

NPG Article Metadata

NPG Full Text SGML

CrossRef Deposit Record

Transform toHTML

(ContentExplorer)

Preview HTML &References with

links(ContentExplorer)

Every 4 weeksnew query

SGML

Resolve DOIs(ContentExplorer)

HTML Text

HTMLReference

Section

SGML ReferenceSection

Extracted inDatabase(ContentExplorer)

Return for editing

HTML

CrossRefMDDB

Query

Query

HTMLReference

Section

Server-side include

Approve &Post to web

site

NPGRefmaster

Insert Found DOIs

1a

1b

2 3

4

5

The Query

Finds References

Queries CrossRef & Inserts found DOIs into NPG Refmaster

Builds Reference Sections from DOIs in NPG Refmaster

The User Experience

Article with Abstract

Article w/o abstract

Articles referred & linked in same issue!

Statistics (22.02.02)

61,536 unique DOI Article links found out of total 252,474 unique references (24% match rate)

87,179 total DOI links on site 31 journals deposited in CR MDDB 25,567 records deposited in CR

MDDB

Experiences Problems linking from NPG products to

Nature Research titles NPG journal short titles differed from Medline syntax used by

CrossRef Created pre-query filter. Transforms NPG short titles to Medline

syntax for query – problem solved! AOP DOI registration was too slow via CrossRef

Created end-run process to Handle Server Changing NPG DOI syntax from completely dumb

to internally logical 10.1038/80132 10.1038/ng732

Use DOI for all inbound links to NPG products! Document Delivery Revenue is increasing Added DOI Search to nature.com

Plans

Nature Science Update articles to be deposited and have ref queries built

Inbound links to ELS/EAA – testing now

Further automate process with Content Management System (CMS)

Contact

Howard RatnerCTO, Nature Publishing Group

h.ratner@natureny.comwww.nature.com