Additional material added to — and usually following — an article, for example, a table (or set of tables), maps, notes, etc. This is ancillary or supporting material, not a direct continuation of the text of an article.


In previous versions of this Tag Set, a <title> element was required on each appendix. A title was considered to be the basic requirement for producing an automated Table of Contents for online viewing of an article; so a title was required. However, as nice as it would be to keep that requirement, this is a conversion target Tag Set, and conversion experience has shown that not all appendices in the wild have either titles (e.g., “Conversion Tables)” or labels (“Appendix 6”). Without true section-level headings it will be difficult to create automatic Tables of Contents and high-quality web and print displays.


content-type Type of Content
id Identifier
specific-use Specific Use

Content Model

<!ELEMENT  app          %app-model;                                  >

Expanded Content Model

((sec-meta?, label?, title?, 
(address | alternatives | array | boxed-text | chem-struct-wrap | fig | fig-group | 
graphic | media | preformat | supplementary-material | table-wrap | table-wrap-group | 
disp-formula | disp-formula-group | p | def-list | list | tex-math | mml:math | 
related-article | related-object | ack | disp-quote | speech | statement | verse-group | x)*, 
(notes | fn-group | glossary | ref-list)*), permissions?)


The following, in order:

This element may be contained in:



<sec><title>The Bipolar Seesaw.</title>
<p>The evidence for the antiphasing of the millennial-duration climate 
changes occurring on the Antarctic continent ...</p>...</sec>