Enumeration of shapes. Comma separated list of integer values. Percentage value. nn for radian measure or nn° for degree Resolution value in dots per inch (dpi). A single number stands for horizontal and vertical resolution having the same values. Two numbers can be used to define different resolutions for horizontal (first number) and vertical (second number). core attributes common to most elements id document-wide unique id class space separated list of classes lang language code (backwards compatible) xml:lang language code (as per XML 1.0 spec) dir direction for weak/neutral text iref URI of the image corresponding to the region positioning attributes common to most elements shape shape of an element coords coordinates of an element angle angle of text direction 0 is horizontal to the right, positive values mean counter-clockwise rotation baseline angle of the characters in a line of text Global container for hidden text and annotations. Contains language attributes, an optional xhtml head and a mandatory body. User defined properties for a hidden text and annotations object. A hiddentext element contains hidden text for a page. A region element contains hidden text for a page region. A paragraph element contains hidden text for a paragraph. A line element contains hidden text for a line. A word element contains hidden text for a word. A altword element contains hidden text for a alternative word. A char element contains a hidden text character. A altchar element contains a hidden text alternative character. A snippet element identifies an unrecognised portion of the image. The annotations element represents annotated, clickable and highlighted areas on a page. An area element represents a clickable and/or highlighted area on a page.