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NCBIArch_2, NCBI/NLM Journal Archiving and Interchange Document Type Definition (NLM DTD), Version 2.x

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Format Description Properties Explanation of format description terms

Identification and description Explanation of format description terms

Full name Formal name: NCBI/NLM Journal Archiving and Interchange Document Type Definition (DTD), versions 2.0 through 2.3. Common name: NLM DTD, version 2.x
Description

Often referred to as the NLM DTD, the Journal Archiving and Interchange Tag Library was intended as a common format in which publishers and archives can exchange final journal article content. See NCBIArch_1 for a description of the 1.x versions of this format and characteristics of the family of DTDs as a whole. Versions of this DTD with numbers between 2.0 and 2.3 were published by the National Center for Biotechnology Information (NCBI), a division of the National Library of Medicine (NLM) as follows:

  • 2.0 -- December 30, 2004 [https://dtd.nlm.nih.gov/2.0/]. Major changes from versions 1.x included: general loosening to further the goals of preservationist archives; re-modularization of the tag suite to support more convenient local customization by publishers; and re-organization of modules to support the future addition of a smaller Authoring Tag Set to the Archiving and Publishing variants. The changes were fully backwards compatible for document instances but previous customizations of the tag sets were not necessarily compatible with version 2.0 and beyond. This version also included the first NCBI Book Tag Set.
  • 2.1 -- November 14, 2005 [https://dtd.nlm.nih.gov/2.1/]. The main changes from version 2.0 were the release of the Authoring Tag Set and incorporation of a new version of MathML. Other changes included a richer set of tags for copyright information.
  • 2.2 -- June 8, 2006 [https://dtd.nlm.nih.gov/2.2/]. The changes from version 2.1 were small, mainly added attribute values.
  • 2.3 -- March 28, 2007 [https://dtd.nlm.nih.gov/2.3/]. The changes from version 2.2 were enhancements, all made backwards compatible.

See NCBIArch_1 for more information about the structure and characteristics of the family of DTDs as a whole.
Production phase Generally used for exchanging works in their final state. A related Publishing DTD (built from the same tag set) is intended as an initial- or middle-state format for authors and publishers.
Relationship to other formats
    Defined via XML_DTD, XML Document Type Definition (DTD)
    Has earlier version NCBIArch_1, NCBI/NLM Journal Archiving and Interchange DTD, version 1.x
    Has later version NCBIArch_3, NCBI/NLM Journal Archiving and Interchange DTD, version 3.0

Local use Explanation of format description terms

LC experience or existing holdings

See NCBIArch_1

LC preference

See NCBIArch_1


Sustainability factors Explanation of format description terms

Disclosure Openly documented. All components of the Journal Archiving and Interchange DTD Suite are in the public domain.
    Documentation

See NLM Journal Archiving and Interchange Tag Suite | Tag Suite Versions for links to documentation for all versions of the NLM DTD.
Adoption

For a publisher to update workflows to use a new DTD can be a major undertaking. As of 2016, a substantial number of publishers appear to be using versions 2.x of the NLM DTD. According to information provided by Portico on article submissions in 2016 for its archival service, almost 30 publishers submitted a total of about 450,000 articles in versions 2.x of the Archiving and Interchange DTD, and a similar number of publishers submitted about 300,000 articles in versions 2.x of the Publishing DTD.
    Licensing and patents No licensing or patent issues. The tag sets are in the public domain.
Transparency Rates highly for transparency. Text content for articles is in XML, and hence viewable in basic editors, web browsers, etc. Elements have understandable tag-names, and document instances are in natural reading order.
Self-documentation The DTD includes a rich set of elements for metadata at the article and journal level. The <article> element is expected to include the article content and full descriptive metadata.
External dependencies None.
Technical protection considerations None.

Quality and functionality factors Explanation of format description terms

Text
Normal rendering

See NCBIArch_1


File type signifiers and format identifiers Explanation of format description terms

Tag Value Note
Filename extension xml
 For textual content files.
Magic numbers See related format.  See NCBIArch_1

Notes Explanation of format description terms

General

See NCBIArch_1

History

See NCBIArch_1


Format specifications Explanation of format description terms


Useful references

URLs


Last Updated: 03/11/2017

 
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