CSS Element Qualities

2008 Oct 17

**Element Types**
Type	Meaning
Replaced	Element is replaced by something not in document content (e.g. img, input).
Nonreplaced	Content of element is in the element and is displayed in the element's rectangle or box.

**Element Display Levels or Roles**
Display	Meaning
Block	Element's rectangle by default fills parent's element content area, and cannot have other elements at its sides, i.e. has implicit break before and after the element box; e.g. p, div, li.
Inline	Element's rectangle is within a line of text and does not break flow of line; e.g. b, em.

In HTML and XHTML block elements cannot descend from inline elements.
In CSS there is no restriction on how display roles can be nested within each other.