Length Attribute Type

The Length Attribute Type is a data type defined by XHTML Modularisation 1.1, declared in the DTD as XML 1.0 type CDATA.
Reference: *W3C - XHTML Modularisation 1.1 - Attribute Types

Specific Attributes with Type Length

1. cellpadding:
   This is declared on the element: table
2. cellspacing:
   This is declared on the element: table
3. charoff:
   This is declared on the elements: col, colgroup, thead, tfoot, tbody, tr, th, td
4. height:
   This is declared on the elements: object, img
5. width:
   This is declared on the elements: object, img, table

Common Attributes with Type Length

There are no Common Attributes with type Length.

Attribute Value for Type Length

Length specified as a percentage or in pixels, e.g. "20%" or "10"

When heights (or widths) are specified as a percentage, this is a percentage of the vertical (or horizontal) space available to the element. This available space is usually given by the height (or width) of the element's parent.

Note: Percentage values are not well supported for either cellpadding or cellspacing attributes and the charoff attribute currently does not seem to be supported at all by any browser.