W3C Specification: CSS 2.1 | Inline-level elements and inline boxes
Inline-level elements are those elements of the source document that do not form new blocks of content; the content is distributed in lines (e.g., emphasized pieces of text within a paragraph, inline images, etc.). Several values of the ‘display’ property make an element inline: ‘inline’, ‘inline-table’, and ‘run-in’ (part of the time; see run-in boxes).…