From the pattern: "The Text Blocks Pattern is used for contexts that stand alone, and normally contain
Running Text. Examples include paragraphs, headings and lists; a list contains list items and not
usually Running Text directly, but it stands alone, with a clear break before and after.
Text Blocks are normally themselves contained in Container elements such as Chapter, Section, ListItem, and so forth."
This pattern is from The XML Specification Guide Web site by Ian Graham and Liam Quin.
This is on of a group of documentation oriented design patterns presented at the site.