Type of Content


Identifies a subject or type of content that makes this element semantically special


This attribute can be used to name or describe a special function for an associated element, for example, to record that the content of a table cell is a total or subtotal amount, that a side bar (element <boxed-text>) contains a case study, or that a <statement> element’s content is a theorem.


This attribute could identify a drug name, company name, or product name. It could also be used to define systematics terms, such as genus, family, order, or suborder. Similarly, it could be used to identify biological components, such as gene, protein, or peptide. Therefore, the values may include information classes, semantic categories, or types of nouns such as “generic-drug-name”, “genus-species”, “gene”, “peptide”, “product”, etc.

The presence of a content-type attribute may be used to treat its element in a special way, for example, giving the work, phrase, or structure a different look in print or on display. This type of formatting may be guided by the value of the attribute, for example, putting a background image behind case studies.

Design Note: In version 2.3, because “type” attributes were viewed as a useful tool for preserving Publisher semantics without extending the tag set, content-type attributes were added to more than 60 elements according to the following rationale.

Attribute Values

In Element

<named-content> Named Special (Subject) Content
Value Meaning
Text, numbers, or special characters Names/describes the special function for the <named-content> that cannot otherwise be described by the elements in this tag set. For example, a medical article might use the value “body-system” or “gene” while a management article might use the value “product-name” or “stock-code”.
Restriction: This attribute must be specified if the element is used.

In Elements

<abbrev> Abbreviation or Acronym; <access-date> Access Date for Cited Work; <ack> Acknowledgments; <addr-line> Address Line; <address> Address/Contact Information; <aff> Affiliation; <alt-text> Alternate Title Text (For a Figure, Etc.); <annotation> Annotation in a Citation; <app> Appendix; <app-group> Appendix Matter; <author-comment> Author Comment; <bio> Biography; <boxed-text> Boxed Text; <caption> Caption of a Figure, Table, Etc.; <chem-struct> Chemical Structure (Display); <chem-struct-wrapper> Chemical Structure Wrapper; <col> Table Column (XHTML table model); <colgroup> Table Column Group (XHTML table model); <comment> Comment in a Citation; <conf-date> Conference Date; <conf-loc> Conference Location; <conf-name> Conference Name; <conf-num> Conference Number; <conf-sponsor> Conference Sponsor; <conf-theme> Conference Theme; <contract-num> Contract Number; <contract-sponsor> Contract Sponsor; <contrib-group> Contributor Group; <copyright-holder> Copyright Holder; <copyright-statement> Copyright Statement; <copyright-year> Copyright Year; <country> Country: in an Address; <day> Day; <degrees> Degree(s); <disp-formula> Formula, Display; <disp-quote> Quote, Displayed; <edition> Edition, Cited; <elocation-id> Electronic Location Identifier; <email> Email Address; <fax> Fax Number: in an Address; <fpage> First Page; <gloss-group> Glossary Group; <glossary> Glossary Elements List; <gov> Government Report, Cited; <grant-num> Grant Number; <grant-sponsor> Grant Sponsor; <inline-formula> Formula, Inline; <inline-supplementary-material> Inline Supplementary Material; <institution> Institution Name: in an Address; <isbn> ISBN; <issue> Issue Number; <issue-id> Issue Identifier; <issue-title> Issue Title; <long-desc> Long Description; <lpage> Last Page; <media> Media Object; <month> Month; <name> Name of Person; <object-id> Object Identifier; <p> Paragraph; <page-range> Page Ranges; <patent> Patent Number, Cited; <phone> Phone Number: in an Address; <ref> Reference Item; <ref-list> Reference List (Bibliographic); <role> Role or Function Title of Contributor; <season> Season; <self-uri> URI for This Same Article Online; <series> Series; <source> Source; <speaker> Speaker; <speech> Speech; <statement> Statement, Formal; <std> Standard, Cited; <subtitle> Article Subtitle; <suffix> Suffix; <supplementary-material> Supplementary Material; <table> Table (XHTML table model); <table-wrap> Table Wrapper; <tbody> Table Body (XHTML table model); <td> Table Data Cell (XHTML table model); <tfoot> Table Footer (XHTML table model); <th> Table Header Cell (XHTML table model); <thead> Table Header (XHTML table model); <time-stamp> Time Stamp for Cited Work; <title> Title; <tr> Table Row (XHTML table model); <trans-source> Translated Source; <trans-title> Translated Title; <uri> Uniform Resource Indicator (URI); <verse-group> Verse Form for Poetry; <verse-line> Line of a Verse; <volume> Volume Number; <volume-id> Volume Identifier; <year> Year
Value Meaning
Text, numbers, or special characters Names/describes any special semantics of the associated element. This may be used to preserve the semantic intent of prior tagging, for example, to record that a table cell was a total or subtotal amount. This may also be used to attach information classes to an element for retrieval purposes.
Restriction: This attribute may be specified if the element is used.