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Table of contents headings, document types and subject codes

Three DTD 4 elements are relevant to the classification of journal articles:

1. Table of contents headings

The tocheading sub-element of documentinfo contains the heading or category under which an article should appear on a table of contents. Where tables of contents have more than one hierarchy of heading, this can be indicated by specifying more than one tocheading element with appropriate level attributes.

2. Document types

The type attribute on document provides a generic classification for the document. e.g. "primary_article". Allowable type values are specified on document's type attribute page. These type values are used to classify articles for production purposes and are not displayed online or in print.

Same types, different headings

Articles from across a range of journals will have the same document[@type] value but different tocheading values.

For example, research articles may be called "Full papers" in Journal A:

<document type="primary_article">
...
<tocheading>Full papers</tocheading>

In Journal B, research articles are called "Refereed Papers":

<document type="primary_article">
...
<tocheading>Refereed Papers</tocheading>

And in Journal C (a German-language journal), research articles are called "Originalarbeiten":

<document type="primary_article">
...
<tocheading>Originalarbeiten</tocheading>

All three have the same document[@type] attribute value, but have different tocheading values.

3. Subject codes

One or more subject codes may be assigned to an article to aid searching and classification of articles. Where subject codes have been assigned, these should be contained in the subjectgroup sub-element of documentinfo.

4. Example

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