Names the image format of the bitmap provided with a <glyph-data> element that is used to define a private use character, if the <private-char> contains a bitmap.


If a plain bitmap is included inline, the value of this attribute should be “PBM”, indicating that the plain text bitmap will be a human-readable matrix of zeros and ones.

Attribute Values

In Element

<glyph-data> Glyph Data for a Private Character
Value Meaning
A word This word names the format of the bitmap. The word may not contain any spaces, and the characters of the word are limited to letters, numbers, and the special characters: period, hyphen, underscore, and colon.
Restriction: This attribute may be specified if the element is used.