This attribute is common to all block-like elements. When text flows around a figure or table in the margin, you sometimes want to start an element like a header, paragraph or list below the figure rather than alongside it. Normally, the sequence number is initialized to 1 at the beginning of the document and incremented after each header element. It is reset to 1 by any header element of a higher level, e.g. an H1 header resets the sequence numbers for H2 to H6. The style of header numbering is controlled by the style sheet.
SKIP Increments the sequence number before rendering the element.
It is used when headers have been left out of the sequence. The icon is specified as an entity name. A list of standard icon entity names for HTML 3.0 is given in an appendix of this specification. SRC Specifies an image to appear preceding the header. This attribute may appear together with the MD attribute.