For this article (and most of the other examples), only an excerpt will be shown on index pages and in the Atom feeds.
Excerpts may be extracted from the article content. Special tags are used to denote the beginning and end:
<!--excerpt--> […] <!--/excerpt-->
These tags can be configured freely. Note that it is possible to only use one of the tags: If only the start tag is used, everything between the tag and the end of the content will be used as excerpt. If only the end tag is used, everything between the start of the content and the end tag is used as excerpt.
It is also possible to include the excerpt directly in the article’s meta data, so it is independent from the article content.